Meiosis and Sexual Life Cycles

Size: px
Start display at page:

Download "Meiosis and Sexual Life Cycles"

Transcription

1 Chapter 13 Meiosis ad Sexual Life Cycles Dr. Wedy Sera Housto Commuity College Biology 1406 Variatios o a Theme Livig orgaisms are distiguished by their ability to reproduce their ow kid Geetics is the scietific study of heredity ad variatio Heredity is the trasmissio of traits from oe geeratio to the ext Variatio is demostrated by the differeces i appearace that offsprig show from parets ad sibligs Cocept 13.1: Offsprig acquire gees from parets by iheritig I a literal sese, childre do ot iherit particular physical traits from their parets It is gees that are actually iherited Figure 13.1 What accouts for family resemblace? 1

2 Iheritace of Gees Gees are the uits of heredity ad are made up of segmets of DNA Gees are passed to the ext geeratio via reproductive cells called gametes (sperm ad eggs) Most DNA is packaged ito Humas have 46 i their somatic cells, all cells of the body, except gametes ad their precursors A gee s specific positio alog a chromosome is called the locus Compariso of Asexual ad Sexual Reproductio I asexual reproductio, a sigle idividual passes all of its gees to its offsprig without the fusio of gametes A cloe is a group of geetically idetical idividuals from the same paret I sexual reproductio, two parets give rise to offsprig that have uique combiatios of gees iherited from the two parets Figure 13.2 Asexual reproductio i two multicellular orgaisms 0.5 mm Bud Paret (a) Hydra (b) Redwoods 2

3 Cocept 13.2: Fertilizatio ad meiosis alterate i sexual life cycles A life cycle is the geeratio-to-geeratio sequece of stages i the reproductive history of a orgaism Sets of Chromosomes i Huma Cells Huma somatic cells have 23 pairs of A karyotype is a ordered display of the pairs of from a cell The two i each pair are called homologous, or homologs Chromosomes i a homologous pair are the same legth ad shape ad carry gees cotrollig the same iherited characters Figure 13.3 Research method: preparig a karyotype Applicatio Techique Pair of homologous duplicated Cetromere 5 µm Metaphase chromosome 3

4 Figure 13.3 Research method: preparig a karyotype 5 µm Sets of Chromosomes i Huma Cells, cot. The sex, which determie the sex of the idividual, are called X ad Y Huma females have a homologous pair of X (XX) Huma males have oe X ad oe Y chromosome The remaiig 22 pairs of are called autosomes Sets of Chromosomes i Huma Cells, cot. Each pair of homologous icludes oe chromosome from each paret The 46 i a huma somatic cell are two sets of 23: oe set from the mother ad oe set from the father A diploid cell (2) has two sets of For humas, the diploid umber is 46 (2 = 46) 4

5 Sets of Chromosomes i Huma Cells, cot. I a cell i which DNA sythesis has occurred, each chromosome is replicated Each replicated chromosome cosists of two idetical sister Figure 13.4 Describig 2 = 6 Key Materal set of ( = 3) Pateral set of ( = 3) of oe duplicated chromosome Cetromere Two osister i a homologous pair Pair of homologous (oe from each set) Sets of Chromosomes i Huma Cells, cot. A gamete (sperm or egg) cotais a sigle set of ad is haploid () For humas, the haploid umber is 23 ( = 23) Each set of 23 cosists of 22 autosomes ad a sigle sex chromosome I a ufertilized egg (ovum), the sex chromosome is X I a sperm cell, the sex chromosome may be either X or Y 5

6 Behavior of Chromosome Sets i the Huma Life Cycle Fertilizatio is the uio of gametes (the sperm ad the egg) The fertilized egg is called a zygote ad has oe set of from each paret The zygote produces somatic cells by mitosis ad develops ito a adult Behavior of Chromosome Sets i the Huma Life Cycle, cot. At sexual maturity, the ovaries ad testes produce haploid gametes Gametes are the oly types of huma cells produced by meiosis, rather tha mitosis Meiosis results i oe set of i each gamete Fertilizatio ad meiosis alterate i sexual life cycles to maitai chromosome umber Key Haploid gametes ( = 23) Haploid () Egg () Diploid (2) Figure 13.5 The huma life cycle Sperm () MEIOSIS FERTILIZATION Ovary Testis Diploid zygote (2 = 46) Mitosis ad developmet Multicellular diploid adults (2 = 46) 6

7 The Variety of Sexual Life Cycles The alteratio of meiosis ad fertilizatio is commo to all orgaisms that reproduce sexually The three mai types of sexual life cycles differ i the timig of meiosis ad fertilizatio Figure 13.6 Three types of sexual life cycles Key Haploid () Diploid (2) MEIOSIS 2 Gametes Diploid multicellular orgaism FERTILIZATION Zygote 2 Mitosis Haploid multicellular orgaism (gametophyte) Haploid uicellular or multicellular orgaism Mitosis Mitosis Mitosis Mitosis Spores Gametes Gametes MEIOSIS FERTILIZATION 2 Diploid multicellular orgaism (sporophyte) 2 Zygote Mitosis MEIOSIS 2 Zygote (a) Aimals (b) Plats ad some algae (c) Most fugi ad some protists FERTILIZATION Sexual Life Cycles i Aimals Gametes are the oly haploid cells i aimals They are produced by meiosis ad udergo o further cell divisio before fertilizatio Gametes fuse to form a diploid zygote that divides by mitosis to develop ito a multicellular orgaism 7

8 Figure 13.6 Three types of sexual life cycles (part 1: aimal) Gametes MEIOSIS FERTILIZATION 2 Zygote 2 Diploid multicellular orgaism (a) Aimals Mitosis Key Haploid () Diploid (2) Sexual Life Cycles i Plats Plats ad some algae exhibit a alteratio of geeratios This life cycle icludes both a diploid ad haploid multicellular stage The diploid orgaism, called the sporophyte, makes haploid spores by meiosis Each spore grows by mitosis ito a haploid orgaism called a gametophyte A gametophyte makes haploid gametes by mitosis Fertilizatio of gametes results i a diploid sporophyte Haploid multicellular orgaism (gametophyte) Mitosis Mitosis Spores Gametes MEIOSIS FERTILIZATION Figure 13.6 Three types of sexual life cycles (part 2: plat) 2 Diploid multicellular orgaism (sporophyte) 2 Zygote Mitosis (b) Plats ad some algae Key Haploid () Diploid (2) 8

9 Sexual Life Cycles i Fugi & Some Protists I most fugi ad some protists, the oly diploid stage is the sigle-celled zygote; there is o multicellular diploid stage The zygote produces haploid cells by meiosis Each haploid cell grows by mitosis ito a haploid multicellular orgaism The haploid adult produces gametes by mitosis Haploid uicellular or multicellular orgaism Mitosis MEIOSIS Mitosis Gametes FERTILIZATION Figure 13.6c Three types of sexual life cycles (part 3: fugi) 2 Zygote (c) Most fugi ad some protists Key Haploid () Diploid (2) Sexual Life Cycles, cot. Depedig o the type of life cycle, either haploid or diploid cells ca divide by mitosis However, oly diploid cells ca udergo meiosis I all three life cycles, the halvig ad doublig of cotributes to geetic variatio i offsprig 9

10 Cocept 13.3: Meiosis reduces the umber of chromosome sets from diploid to haploid Like mitosis, meiosis is preceded by the replicatio of Meiosis takes place i two cosecutive cell divisios, called meiosis I ad meiosis II The two cell divisios result i four daughter cells, rather tha the two daughter cells i mitosis Each daughter cell has oly half as may as the paret cell The Stages of Meiosis Chromosomes duplicate durig iterphase The resultig sister are closely associated alog their legths This is called sister chromatid cohesio I meiosis, the are sorted ito four haploid daughter cells Iterphase Pair of homologous i diploid paret cell Pair of duplicated homologous Meiosis I Meiosis II Chromosomes duplicate Diploid cell with duplicated 1 Homologous separate Haploid cells with duplicated 2 separate Figure 13.7 Overview of meiosis: how meiosis reduces chromosome umber Haploid cells with uduplicated 10

11 Figure 13.8 Explorig meiosis i a aimal cell MEIOSIS I: Separates homologous Prophase I Metaphase I Aaphase I Telophase I ad Cytokiesis MEIOSIS II: Separates sister Prophase II Metaphase II Aaphase II Telophase II ad Cytokiesis Cetrosome Cetromere (with (with cetriole kietochore) pair) remai Chiasmata Metaphase attached Spidle plate Homologous Cleavage Homologous furrow Fragmets separate of uclear Microtubules evelope attached to kietochore separate Haploid daughter cells formig The Stages of Meiosis Meiosis I Divisio i meiosis I occurs i four phases Prophase I Metaphase I Aaphase I Telophase I ad cytokiesis Figure 13.8 MEIOSIS I: Separates homologous Prophase I Metaphase I Aaphase I Cetrosome (with cetriole pair) Chiasmata Spidle Cetromere (with kietochore) Metaphase plate remai attached Telophase I ad Cytokiesis Homologous Fragmets of uclear evelope Homologous separate Microtubules attached to kietochore Cleavage furrow 11

12 The Stages of Meiosis Meiosis I Prophase I I early prophase I each chromosome pairs with its homolog ad crossig over occurs X-shaped regios called chiasmata are sites of crossover Crossig Over ad Syapsis Durig Prophase I After iterphase, the sister are held together by proteis called cohesis The osister are broke at precisely correspodig positios A zipper-like structure called the syaptoemal complex holds the homologs together tightly DNA breaks are repaired, joiig DNA from oe osister chromatid to the correspodig segmet of aother Figure 13.9 Crossig over ad syapsis i prophase I DNA DNA breaks breaks Cetromere Cohesis Pair of homologous : Pateral sister Crossover Crossover 1 Materal sister 3 Chiasmata Syaptoemal complex formig

13 The Stages of Meiosis Meiosis I Metaphase I I metaphase I, pairs of homologs lie up at the metaphase plate, with oe chromosome facig each pole Microtubules from oe pole are attached to the kietochore of oe chromosome of each tetrad Microtubules from the other pole are attached to the kietochore of the other chromosome The Stages of Meiosis Meiosis I Aaphase I I aaphase I, pairs of homologous separate Oe chromosome of each pair moves toward opposite poles, guided by the spidle apparatus remai attached at the cetromere ad move as oe uit toward the pole The Stages of Meiosis Meiosis I Telophase I ad Cytokiesis I the begiig of telophase I, each half of the cell has a haploid set of ; each chromosome still cosists of two sister Cytokiesis usually occurs simultaeously, formig two haploid daughter cells 13

14 The Stages of Meiosis Meiosis I I aimal cells, a cleavage furrow forms; i plat cells, a cell plate forms No chromosome replicatio occurs betwee the ed of meiosis I ad the begiig of meiosis II because the are already replicated Meiosis I is called the reductioal divisio because it reduces the umber of per cell BioFlix: Meiosis The Stages of Meiosis Meiosis II Divisio i meiosis II also occurs i four phases Prophase II Metaphase II Aaphase II Telophase II ad cytokiesis Meiosis II is very similar to mitosis! 14

15 Figure 13.8 Explorig meiosis i a aimal cell (meiosis II) MEIOSIS II: Separates sister Prophase II Metaphase II Aaphase II Telophase II ad Cytokiesis separate Haploid daughter cells formig The Stages of Meiosis Meiosis II Prophase II I prophase II, a spidle apparatus forms I late prophase II, (each still composed of two ) move toward the metaphase plate The Stages of Meiosis Meiosis II Metaphase II I metaphase II, the sister are arraged at the metaphase plate Because of crossig over i meiosis I, the two sister of each chromosome are o loger geetically idetical The kietochores of sister attach to microtubules extedig from opposite poles 15

16 The Stages of Meiosis Meiosis II Aaphase II I aaphase II, the sister separate The sister of each chromosome ow move as two ewly idividual toward opposite poles The Stages of Meiosis Meiosis II Telophase II ad Cytokiesis I telophase II, the arrive at opposite poles Nuclei form, ad the begi decodesig The Stages of Meiosis Meiosis II Cytokiesis separates the cytoplasm At the ed of meiosis, there are four daughter cells, each with a haploid set of ureplicated Each daughter cell is geetically distict from the others ad from the paret cell 16

17 Figure 13.8 Explorig meiosis i a aimal cell MEIOSIS I: Separates homologous Prophase I Metaphase I Aaphase I Telophase I ad Cytokiesis MEIOSIS II: Separates sister Prophase II Metaphase II Aaphase II Telophase II ad Cytokiesis Cetrosome Cetromere (with (with cetriole kietochore) pair) remai Chiasmata Metaphase attached Spidle plate Homologous Cleavage Homologous furrow Fragmets separate of uclear Microtubules evelope attached to kietochore separate Haploid daughter cells formig A Compariso of Mitosis ad Meiosis Mitosis coserves the umber of chromosome sets, producig cells that are geetically idetical to the paret cell Meiosis reduces the umber of sets from two (diploid) to oe (haploid), producig cells that differ geetically from each other ad from the paret cell Figure A compariso of mitosis ad meiosis MITOSIS MEIOSIS Paret cell Chiasma MEIOSIS I Prophase Duplicated chromosome Chromosome duplicatio 2 = 6 Chromosome duplicatio Prophase I Homologous chromosome pair Metaphase Aaphase Telophase Idividual lie up. separate. Pairs of homologous lie up. Homologs separate. Metaphase I Aaphase I Telophase I 2 Daughter cells of mitosis 2 separate. Daughter cells of meiosis I Daughter cells of meiosis II MEIOSIS II 17

18 Figure 13.10b Property DNA replicatio Number of divisios Syapsis of homologous Number of daughter cells ad geetic compositio Role i the aimal or plat body plat Mitosis (occurs i both diploid ad haploid cells) Occurs durig iterphase before mitosis begis Oe, icludig prophase, prometaphase, metaphase, aaphase, ad telophase Does ot occur Two, each geetically idetical to the paret cell, with the same umber of Eables multicellular aimal or plat (gametophyte or sporophyte) to arise from a sigle cell; produces cells for growth, repair, ad, i some species, asexual reproductio; produces gametes i the gametophyte SUMMARY Meiosis (ca oly occur i diploid cells) Occurs durig iterphase before meiosis I begis Two, each icludig prophase, metaphase, aaphase, ad telophase Occurs durig prophase I alog with crossig over betwee osister ; resultig chiasmata hold pairs together due to sister chromatid cohesio Four, each haploid (); geetically differet from the paret cell ad from each other Produces gametes (i aimals) or spores (i the sporophyte plat); reduces umber of sets by half ad itroduces geetic variability amog the gametes or spores Evets Uique to Meiosis Three evets are uique to meiosis, ad all three occur i meiosis l Syapsis ad crossig over i prophase I: Homologous physically coect ad exchage geetic iformatio Homologous pairs at the metaphase plate Separatio of homologs durig aaphase I Cocept 13.4: Geetic variatio produced i sexual life cycles cotributes to evolutio Mutatios (chages i a orgaism s DNA) are the origial source of geetic diversity Mutatios create differet versios of gees called alleles Reshufflig of alleles durig sexual reproductio produces geetic variatio 18

19 Origis of Geetic Variatio Amog Offsprig The behavior of durig meiosis ad fertilizatio is resposible for most of the variatio that arises i each geeratio Three mechaisms cotribute to geetic variatio 1. Idepedet assortmet of 2. Crossig over 3. Radom fertilizatio Idepedet Assortmet of Chromosomes Homologous pairs of oriet radomly at metaphase I of meiosis I idepedet assortmet, each pair of sorts materal ad pateral homologs ito daughter cells idepedetly of the other pairs The umber of combiatios possible whe assort idepedetly ito gametes is 2, where is the haploid umber For humas ( = 23), there are more tha 8 millio (2 23 ) possible combiatios of! Figure The idepedet assortmet of homologous i meiosis Possibility 1 Possibility 2 Two equally probable arragemets of at metaphase I Metaphase II Daughter cells Combiatio 1 Combiatio 2 Combiatio 3 Combiatio 4 19

20 Crossig Over Crossig over produces recombiat, which combie DNA iherited from each paret Crossig over cotributes to geetic variatio by combiig DNA from two parets ito a sigle chromosome I humas, a average of oe to three crossover evets occurs per chromosome Prophase I of meiosis TEM Aaphase I Aaphase II Pair of homologs Chiasma Cetromere Nosister held together durig syapsis Syapsis ad crossig over Movemet to the metaphase I plate Breakdow of proteis holdig sister chromatid arms together Figure The results of crossig over durig meiosis Daughter cells Recombiat Radom Fertilizatio Radom fertilizatio adds to geetic variatio because ay sperm ca fuse with ay ovum (ufertilized egg) The fusio of two gametes (each with 8.4 millio possible chromosome combiatios from idepedet assortmet) produces a zygote with ay of about 70 trillio diploid combiatios Crossig over adds eve more variatio Each zygote has a uique geetic idetity 20

21 Aimatio: Geetic Variatio The Evolutioary Sigificace of Geetic Variatio Withi Populatios Natural selectio results i the accumulatio of geetic variatios favored by the eviromet Sexual reproductio cotributes to the geetic variatio i a populatio, which origiates from mutatios 21

CH 10: Meiosis / Sex Overview. Concept 10.1: Offspring acquire genes from parents by inheriting chromosomes

CH 10: Meiosis / Sex Overview. Concept 10.1: Offspring acquire genes from parents by inheriting chromosomes CH 10: Meiosis / Sex Overview Livig orgaisms are distiguished by their ability to reproduce their ow kid Heredity is the trasmissio of traits from oe geeratio to the ext Variatio is demostrated by the

More information

Meiosis and Sexual Life Cycles

Meiosis and Sexual Life Cycles Overview: Variatios o a Theme Chapter 13 Meiosis ad Sexual Life Cycles Livig orgaisms are distiguished by their ability to reproduce their ow kid Geetics is the scietific study of heredity ad variatio

More information

General Biology. Overview: Hereditary Similarity and Variation. Living organisms. are distinguished by their ability to reproduce their own kind

General Biology. Overview: Hereditary Similarity and Variation. Living organisms. are distinguished by their ability to reproduce their own kind Course No: BNG2003 Credits: 3.00 Geeral Biology Overview: Hereditary Similarity ad Variatio Livig orgaisms are distiguished by their ability to reproduce their ow kid 9. Meiosis ad Life Cycles Prof. Dr.

More information

General Biology. Overview: Hereditary Similarity and Variation Living organisms. Comparison of Asexual and Sexual Reproduction In asexual reproduction

General Biology. Overview: Hereditary Similarity and Variation Living organisms. Comparison of Asexual and Sexual Reproduction In asexual reproduction Course No: BNG2003" Credits: 3.00 " Geeral Biology " " 9. Meiosis ad Life Cycles Overview: Hereditary Similarity ad Variatio Livig orgaisms are distiguished by their ability to reproduce their ow kid Prof.

More information

Lecture 21: Meiosis Lecture outline 10/25/05

Lecture 21: Meiosis Lecture outline 10/25/05 Lecture 21: Meiosis Lecture outlie 10/25/05 Review mitosis Fiish cell cycle Mutatios i checkpoit gees ca lead to cacer Sexual ad asexual life cycles Meiosis Stages of meiosis Idepedet assortmet ad Crossig

More information

Interphase. Chapter 10 Notes. Objective 1: Summarize the events that occur during mitosis

Interphase. Chapter 10 Notes. Objective 1: Summarize the events that occur during mitosis Chapter 10 Notes Ratio of Surface Area to Volume i Cells 10 1 Cell Growth A. Limits to Cell Growth 1. DNA Overload 2. Exchagig Materials 3. Ratio of Surface Area to Volume 4. Cell Divisio Cell Size Surface

More information

Chapter 5 Cell Division

Chapter 5 Cell Division Chapter 5 Cell Divisio 5.1 Cell Icrease ad Decrease Cell divisio icreases the umber of somatic cells (body cells) Zygote Adult huma (sigle cell) (trillios of cells) The Cell Cycle 5.1 Cell Icrease ad Decrease

More information

Meiosis and Sexual Life Cycles

Meiosis and Sexual Life Cycles 13 Meiosis and Sexual Life Cycles Lecture Presentation by Nicole Tunbridge and Kathleen Fitzpatrick CAMPBELL BIOLOGY TENTH EDITION Reece Urry Cain Wasserman Minorsky Jackson Variations on a Theme Living

More information

Meiosis and Sexual Reproduction

Meiosis and Sexual Reproduction Chapter Preview 1 Reproductio Asexual Reproductio Sexual Reproductio Chromosome Number 11 2 Meiosis Stages of Meiosis Comparig Mitosis ad Meiosis Geetic Variatio 3 Multicellular Life Cycles Diploid Life

More information

BIOLOGY. Meiosis and Sexual Life Cycles CAMPBELL. Reece Urry Cain Wasserman Minorsky Jackson

BIOLOGY. Meiosis and Sexual Life Cycles CAMPBELL. Reece Urry Cain Wasserman Minorsky Jackson CAMPBELL BIOLOGY TENTH EDITION Reece Urry Cain Wasserman Minorsky Jackson 13 Meiosis and Sexual Life Cycles Lecture Presentation by Nicole Tunbridge and Kathleen Fitzpatrick Variations on a Theme Living

More information

Meiosis and Sexual Life Cycles

Meiosis and Sexual Life Cycles 13 Meiosis ad Sexual Life Cycles KEY CONC EPTS 13.1 Offsprig acquire gees from parets by iheritig 13.2 Fertilizatio ad meiosis alterate i sexual life cycles 13.3 Meiosis reduces the umber of chromosome

More information

Meiosis and Sexual Life Cycles

Meiosis and Sexual Life Cycles CAMPBELL BIOLOGY IN FOCUS URRY CAIN WASSERMAN MINORSKY REECE 10 Meiosis and Sexual Life Cycles Lecture Presentations by Kathleen Fitzpatrick and Nicole Tunbridge, Simon Fraser University SECOND EDITION

More information

Meiosis and Sexual Life Cycles

Meiosis and Sexual Life Cycles Chapter 13 Meiosis and Sexual Life Cycles PowerPoint Lecture Presentations for Biology Eighth Edition Neil Campbell and Jane Reece Lectures by Chris Romero, updated by Erin Barley with contributions from

More information

Lecture 14: 2 Parts: 1. Meiosis Chapter 8 2. Inheritance Chapter 9 Leading into Lecture 15:

Lecture 14: 2 Parts: 1. Meiosis Chapter 8 2. Inheritance Chapter 9 Leading into Lecture 15: Lecture 14: 2 Parts: 1. Meiosis Chapter 8 2. Iheritace Chapter 9 Leadig ito Lecture 15: 1. Evolu5o ad Iheritace Chapter 13 Topic #1: Meiosis I Pee o the MAT P MAT! Importat LaH Roots Meiou Mei Lesse Small

More information

Meiosis and Sexual Life Cycles

Meiosis and Sexual Life Cycles Chapter 13 Meiosis and Sexual Life Cycles PowerPoint Lecture Presentations for Biology Eighth Edition Neil Campbell and Jane Reece Lectures by Chris Romero, updated by Erin Barley with contributions from

More information

Meiosis and Sexual Life Cycles

Meiosis and Sexual Life Cycles LECTURE PRESENTATIONS For CAMPBELL BIOLOGY, NINTH EDITION Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson Chapter 13 Meiosis and Sexual Life Cycles

More information

Chapter 13: Meiosis and Sexual Life Cycles Overview: Hereditary Similarity and Variation

Chapter 13: Meiosis and Sexual Life Cycles Overview: Hereditary Similarity and Variation Chapter 13: Meiosis and Sexual Life Cycles Overview: Hereditary Similarity and Variation Living organisms Are distinguished by their ability to reproduce their own kind Biology, 7 th Edition Neil Campbell

More information

For a species to survive, it must REPRODUCE! Ch 13 NOTES Meiosis. Genetics Terminology: Homologous chromosomes

For a species to survive, it must REPRODUCE! Ch 13 NOTES Meiosis. Genetics Terminology: Homologous chromosomes For a species to survive, it must REPRODUCE! Ch 13 NOTES Meiosis Genetics Terminology: Autosomes Somatic cell Gamete Karyotype Homologous chromosomes Meiosis Sex chromosomes Diploid Haploid Zygote Synapsis

More information

Overview. Overview: Variations on a Theme. Offspring acquire genes from parents by inheriting chromosomes. Inheritance of Genes

Overview. Overview: Variations on a Theme. Offspring acquire genes from parents by inheriting chromosomes. Inheritance of Genes Chapter 13 Meiosis and Sexual Life Cycles Overview I. Cell Types II. Meiosis I. Meiosis I II. Meiosis II III. Genetic Variation IV. Reproduction Overview: Variations on a Theme Figure 13.1 Living organisms

More information

Meiosis and Sexual Life Cycles

Meiosis and Sexual Life Cycles Chapter 13 Meiosis and Sexual Life Cycles PowerPoint Lecture Presentations for Biology Eighth Edition Neil Campbell and Jane Reece Lectures by Chris Romero, updated by Erin Barley with contributions from

More information

Chapter 13: Meiosis & Sexual Life Cycles

Chapter 13: Meiosis & Sexual Life Cycles Chapter 13: Meiosis & Sexual Life Cycles What you must know The difference between asexual and sexual reproduction. The role of meiosis and fertilization in sexually reproducing organisms. The importance

More information

Chapter 11 Meiosis and Sexual Reproduction

Chapter 11 Meiosis and Sexual Reproduction Chapter 11 Meiosis and Sexual S Section 1: S Gamete: Haploid reproductive cell that unites with another haploid reproductive cell to form a zygote. S Zygote: The cell that results from the fusion of gametes

More information

Meiosis and Sexual Reproduction Chapter 11. Reproduction Section 1

Meiosis and Sexual Reproduction Chapter 11. Reproduction Section 1 Meiosis and Sexual Reproduction Chapter 11 Reproduction Section 1 Reproduction Key Idea: An individual formed by asexual reproduction is genetically identical to its parent. Asexual Reproduction In asexual

More information

Ch. 13 Meiosis & Sexual Life Cycles

Ch. 13 Meiosis & Sexual Life Cycles Introduction Ch. 13 Meiosis & Sexual Life Cycles 2004-05 Living organisms are distinguished by their ability to reproduce their own kind. -Offspring resemble their parents more than they do less closely

More information

Ladies and Gentlemen.. The King of Rock and Roll

Ladies and Gentlemen.. The King of Rock and Roll Ladies and Gentlemen.. The King of Rock and Roll Learning Objectives: The student is able to construct an explanation, using visual representations or narratives, as to how DNA in chromosomes is transmitted

More information

Meiosis and Sexual Life Cycles

Meiosis and Sexual Life Cycles Chapter 13 Meiosis and Sexual Life Cycles Lecture Outline Overview Living organisms are distinguished by their ability to reproduce their own kind. Offspring resemble their parents more than they do less

More information

QQ 10/5/18 Copy the following into notebook:

QQ 10/5/18 Copy the following into notebook: Chapter 13- Meiosis QQ 10/5/18 Copy the following into notebook: Similarities: 1. 2. 3. 4. 5. Differences: 1. 2. 3. 4. 5. Figure 13.1 Living organisms are distinguished by their ability to reproduce their

More information

Lecture 12 - Meiosis

Lecture 12 - Meiosis Lecture 12 - Meiosis In this lecture Types of reproduction Alternation of generations Homologous chromosomes and alleles Meiosis mechanism Sources of genetic variation Meiosis and Mitosis Mitosis the production

More information

Chapter 13: Meiosis & Sexual Life Cycles

Chapter 13: Meiosis & Sexual Life Cycles Chapter 13: Meiosis & Sexual Life Cycles What you must know The difference between asexual and sexual reproduction. The role of meiosis and fertilization in sexually reproducing organisms. The importance

More information

SEXUAL REPRODUCTION & MEIOSIS

SEXUAL REPRODUCTION & MEIOSIS SEXUAL REPRODUCTION & MEIOSIS Living organisms are distinguished by their ability to reproduce their own kind. Offspring resemble their parents more than they do less closely related individuals of the

More information

AP Biology. Investigation 7: Cell Division: Mitosis and Meiosis. Investigation 7: Cell Division. Investigation 7: Cell Division

AP Biology. Investigation 7: Cell Division: Mitosis and Meiosis. Investigation 7: Cell Division. Investigation 7: Cell Division AP Biology Learig Objectives Ivestigatio 7: Cell Divisio: Mitosis ad Meiosis To describe the evets i the cell cycle ad how these evets are cotrolled. To explai how DNA is trasmitted to the ext geeratio

More information

Meiosis & Sexual Reproduction

Meiosis & Sexual Reproduction Meiosis & Sexual Reproduction 2007-2008 Cell division / Asexual reproduction Mitosis produce cells with same information identical daughter cells exact copies clones same amount of DNA same number of chromosomes

More information

Biology, 7e (Campbell) Chapter 13: Meiosis and Sexual Life Cycles

Biology, 7e (Campbell) Chapter 13: Meiosis and Sexual Life Cycles Biology, 7e (Campbell) Chapter 13: Meiosis and Sexual Life Cycles Chapter Questions 1) What is a genome? A) the complete complement of an organism's genes B) a specific sequence of polypeptides within

More information

Meiosis and Sexual Reproduction

Meiosis and Sexual Reproduction Meiosis and Sexual Reproduction Asexual Reproduction Single parent produces offspring All offspring are genetically identical to one another and to parent Produces identical somatic (body) cells Sexual

More information

Meiosis and Sexual Life Cycles

Meiosis and Sexual Life Cycles Chapter 13 Meiosis and Sexual Life Cycles Lecture Outline Overview: Variations on a Theme Living organisms are distinguished by their ability to reproduce their own kind. Offspring resemble their parents

More information

You have body cells and gametes Body cells are known as somatic cells. Germ cells develop into gametes or sex cells. Germ cells are located in the

You have body cells and gametes Body cells are known as somatic cells. Germ cells develop into gametes or sex cells. Germ cells are located in the MEIOSIS You have body cells and gametes Body cells are known as somatic cells. Germ cells develop into gametes or sex cells. Germ cells are located in the ovaries and testes. Gametes are sex cells: egg

More information

Outline for today s lecture (Ch. 13)

Outline for today s lecture (Ch. 13) Outline for today s lecture (Ch. 13) Sexual and asexual life cycles Meiosis Origins of Genetic Variation Independent assortment Crossing over ( recombination ) Heredity Transmission of traits between generations

More information

Biology Unit 6 Chromosomes and Mitosis

Biology Unit 6 Chromosomes and Mitosis Biology Unit 6 Chromosomes and Mitosis 6:1 Chromosomes DNA GENES CHROMATIN/CHROMOSOMES CHROMOSOMES/CHROMATIN are made of units called GENES. GENES are made of a compound called deoxyribonucleic acid or

More information

BIOLOGY. COLLEGE PHYSICS Chapter 11 MEIOSIS AND SEXUAL REPRODUCTION Chapter # Chapter Title PowerPoint Image Slideshow

BIOLOGY. COLLEGE PHYSICS Chapter 11 MEIOSIS AND SEXUAL REPRODUCTION Chapter # Chapter Title PowerPoint Image Slideshow BIOLOGY COLLEGE PHYSICS Chapter 11 MEIOSIS AND SEXUAL REPRODUCTION Chapter # Chapter Title PowerPoint Image Slideshow CAMPBELL BIOLOGY TENTH EDITION Reece Urry Cain Wasserman Minorsky Jackson 13 Meiosis

More information

BIOLOGY - CLUTCH CH.13 - MEIOSIS.

BIOLOGY - CLUTCH CH.13 - MEIOSIS. !! www.clutchprep.com CONCEPT: SEXUAL REPRODUCTION Meiosis is a special type of cell division that occurs as part of the sexual life cycle of eukaryotes Sexual reproduction parents donate a unique mixture

More information

MEIOSIS DR. A. TARAB DEPT. OF BIOCHEMISTRY HKMU

MEIOSIS DR. A. TARAB DEPT. OF BIOCHEMISTRY HKMU MEIOSIS DR. A. TARAB DEPT. OF BIOCHEMISTRY HKMU Meiosis is a special type of cell division necessary for sexual reproduction in eukaryotes such as animals, plants and fungi The number of sets of chromosomes

More information

Cell division / Asexual reproduction

Cell division / Asexual reproduction Meiosis & Sexual Reproduction 2007-2008 Cell division / Asexual reproduction Mitosis produce cells with same information identical daughter cells exact copies clones same amount of DNA same number of chromosomes

More information

MEIOSIS, THE BASIS OF SEXUAL REPRODUCTION

MEIOSIS, THE BASIS OF SEXUAL REPRODUCTION MEIOSIS, THE BASIS OF SEXUAL REPRODUCTION Why do kids look different from the parents? How are they similar to their parents? Why aren t brothers or sisters more alike? Meiosis A process where the number

More information

Meiosis. The form of cell division by which gametes, with half the regular number of chromosomes, are produced.

Meiosis. The form of cell division by which gametes, with half the regular number of chromosomes, are produced. MEIOSIS Meiosis The form of cell division by which gametes, with half the regular number of chromosomes, are produced. diploid (2n) haploid (n) (complete set of chromosomes) (half the regular number of

More information

Learning Objectives LO 3.7 The student can make predictions about natural phenomena occurring during the cell cycle. [See SP 6.4]

Learning Objectives LO 3.7 The student can make predictions about natural phenomena occurring during the cell cycle. [See SP 6.4] Big Ideas 3.A.2: In eukaryotes, heritable information is passed to the next generation via processes that include the cell cycle and mitosis or meiosis plus fertilization. CHAPTER 13 MEIOSIS AND SEXUAL

More information

Meiosis and Life Cycles - 1

Meiosis and Life Cycles - 1 Meiosis and Life Cycles - 1 We have just finished looking at the process of mitosis, a process that produces cells genetically identical to the original cell. Mitosis ensures that each cell of an organism

More information

Bellwork. Many organisms reproduce via asexual and sexual reproduction. How would we look if we reproduced mitotically?

Bellwork. Many organisms reproduce via asexual and sexual reproduction. How would we look if we reproduced mitotically? Bellwork Many organisms reproduce via asexual and sexual reproduction. How would we look if we reproduced mitotically? SC.912.L.16.17 Meiosis Functions in Sexual Reproduction Other Standards Addressed:

More information

Meiosis & Sexual Reproduction

Meiosis & Sexual Reproduction Meiosis & Sexual Reproduction 2007-2008 Turn in warm ups to basket! Prepare for your test! Get out your mitosis/meiosis foldable After the test: New vocabulary! 2/23/17 Draw and label the parts of the

More information

Meiosis. Bởi: OpenStaxCollege

Meiosis. Bởi: OpenStaxCollege Meiosis Bởi: OpenStaxCollege Sexual reproduction requires fertilization, a union of two cells from two individual organisms. If those two cells each contain one set of chromosomes, then the resulting cell

More information

Chapter 13: Meiosis and Sexual Life Cycles

Chapter 13: Meiosis and Sexual Life Cycles Name: AP Biology Chapter 13: Meiosis and Sexual Life Cycles 13.1 Offspring acquire genes from parents by inheriting chromosomes 1. Define the following terms: gene locus gamete male gamete female gamete

More information

Intitial Question: How can the mathematically impossible become the biologically possiblenamely,

Intitial Question: How can the mathematically impossible become the biologically possiblenamely, Intitial Question: How can the mathematically impossible become the biologically possiblenamely, a cell with 46 chromosomes splits to form tow cells each with 46 chromosomes/ This means 46 divided by 2

More information

Mitosis. making identical copies of diploid cells

Mitosis. making identical copies of diploid cells Meiosis Mitosis + making identical copies of diploid cells Meiosis + making haploid gametes from a diploid precursor Some terminology Diploid containing two copies of the genome per cell Haploid - containing

More information

MEIOSIS C H A P T E R 1 3

MEIOSIS C H A P T E R 1 3 MEIOSIS CHAPTER 13 CENTRAL DOGMA OF BIOLOGY DNA RNA Protein OFFSPRING ACQUIRE GENES FROM PARENTS Genes are segments of DNA that program specific traits. Genetic info is transmitted as specific sequences

More information

Sexual Reproduction and Meiosis. Outline. Random?? fertilization. Chapter 13

Sexual Reproduction and Meiosis. Outline. Random?? fertilization. Chapter 13 Sexual Reproduction and Meiosis Chapter 13 Outline Reduction Division Unique Features of Meiosis Prophase I Metaphase I Completing Meiosis Second Meiotic Division Sexual Reproduction Origin and Maintenance

More information

Unit 6 : Meiosis & Sexual Reproduction

Unit 6 : Meiosis & Sexual Reproduction Unit 6 : Meiosis & Sexual Reproduction 2006-2007 Cell division / Asexual reproduction Mitosis produce cells with same information identical daughter cells exact copies clones same number of chromosomes

More information

SEXUAL REPRODUCTION MEIOSIS SPERMATOGENESIS & OOGENESIS 2/6/2011. Asexual Reproduction:

SEXUAL REPRODUCTION MEIOSIS SPERMATOGENESIS & OOGENESIS 2/6/2011. Asexual Reproduction: Asexual Reproduction: SEXUAL REPRODUCTON & MEOSS Many single-celled organisms reproduce by splitting, budding, parthenogenesis. Some multicellular organisms can reproduce asexually, produce clones (offspring

More information

Biology Kevin Dees. Chapter 13 Meiosis and Sexual Life Cycles

Biology Kevin Dees. Chapter 13 Meiosis and Sexual Life Cycles Chapter 13 Meiosis and Sexual Life Cycles Reproduction Characteristic of all living things Reproduction also involves the transmission of traits from one generation to the next; inheritance Heredity Latin

More information

Chapter 13 Meiosis and Sexual Life Cycles. Reproduction

Chapter 13 Meiosis and Sexual Life Cycles. Reproduction Chapter 13 Meiosis and Sexual Life Cycles Reproduction Characteristic of all living things Reproduction also involves the transmission of traits from one generation to the next; inheritance Heredity Latin

More information

Meiosis and Sexual Reproduction

Meiosis and Sexual Reproduction Note-taking Workbook Meiosis and Sexual Reproduction Section: Reproduction ASEXUAL REPRODUCTION Key Idea: An individual formed by asexual reproduction is to its parent. Additional notes about Asexual Reproduction:

More information

Essential Knowledge: In eukaryotes, heritable information is passed to the next generation via processes that include the cell cycle and mitosis OR

Essential Knowledge: In eukaryotes, heritable information is passed to the next generation via processes that include the cell cycle and mitosis OR Essential Knowledge: In eukaryotes, heritable information is passed to the next generation via processes that include the cell cycle and mitosis OR meiosis plus fertilization Objective: You will be able

More information

Agenda. 1. Lesson Learning Goals 2. Meiosis 3. Meiosis Bingo

Agenda. 1. Lesson Learning Goals 2. Meiosis 3. Meiosis Bingo Meiosis SBI 3U Agenda 1. Lesson Learning Goals 2. Meiosis 3. Meiosis Bingo Learning Goals By the end of today s lesson, you will be able: To use proper vocabulary related to this unit, including meiosis,

More information

11-4 Meiosis. Chromosome Number

11-4 Meiosis. Chromosome Number 11-4 Meiosis Chromosome Number Sexual reproduction shuffles and recombines genes from two parents. During gametogenesis, genes are segregated and assorted (shuffled) into gemetes, and at fertilization,

More information

Topic 8 Mitosis & Meiosis Ch.12 & 13. The Eukaryotic Genome. The Eukaryotic Genome. The Eukaryotic Genome

Topic 8 Mitosis & Meiosis Ch.12 & 13. The Eukaryotic Genome. The Eukaryotic Genome. The Eukaryotic Genome Topic 8 Mitosis & Meiosis Ch.12 & 13 The Eukaryotic Genome pp. 244-245,268-269 Genome All of the genes in a cell. Eukaryotic cells contain their DNA in long linear pieces. In prokaryotic cells, there is

More information

Chapter 11 - Concept Mapping

Chapter 11 - Concept Mapping Chapter 11 - Concept Mapping Using the terms and phrases provided below, complete the concept map showing the process of meiosis. chromatids crossing-over haploid sperm and ovum homologous chromosomes

More information

Reproduction & Cell Types

Reproduction & Cell Types Reproduction & Cell Types TYPES OF REPRODUCTION Asexual Relies on MITOSIS All of the parent s DNA goes to the offspring Sexual Relies on MEIOSIS Used to create sex cells TYPES OF CELLS Body Cells Includes

More information

CHAPTER 6. Chromosomes and Meiosis

CHAPTER 6. Chromosomes and Meiosis CHAPTER 6 Chromosomes and Meiosis CHROMOSOMES DNA (deoxyribonucleic acid) is a long, thin molecule that directs cellular functions and heredity. DNA contains information that is encoded in segments called

More information

Chapter 13. Meiosis & Sexual Reproduction. AP Biology

Chapter 13. Meiosis & Sexual Reproduction. AP Biology Chapter 13. Meiosis & Sexual Reproduction Cell division / Asexual reproduction Mitosis produce cells with same information identical daughter cells exact copies clones same amount of DNA same number of

More information

Cell Division: the process of copying and dividing entire cells The cell grows, prepares for division, and then divides to form new daughter cells.

Cell Division: the process of copying and dividing entire cells The cell grows, prepares for division, and then divides to form new daughter cells. Mitosis & Meiosis SC.912.L.16.17 Compare and contrast mitosis and meiosis and relate to the processes of sexual and asexual reproduction and their consequences for genetic variation. 1. Students will describe

More information

LECTURE 10A: MEIO S S

LECTURE 10A: MEIO S S LECTURE 10A: MEIOSIS Meiosis Definition INTRODUCTION 1. Meiosis is the production of gametes, which is a reduction division which means a diploid gamete produces haploid gametes - from a full complement

More information

1. CHROMOSOMES AND MEIOSIS

1. CHROMOSOMES AND MEIOSIS Meiosis and Mendel Answer Key SECTION 1. CHROMOSOMES AND MEIOSIS 1. somatic/body cells; germ cells/gametes 2. in the reproductive organs; ovaries and testes 3. 46 4. mother 5. father 6. autosomes 7. X

More information

Meiosis & Sexual Reproduction (Ch. 13)

Meiosis & Sexual Reproduction (Ch. 13) Meiosis & Sexual Reproduction (Ch. 13) Cell division / Asexual reproduction Mitosis produce cells with same information identical daughter cells exact copies clones same amount of DNA same number of chromosomes

More information

Meiosis & Sexual Reproduction. AP Biology 2/27/15

Meiosis & Sexual Reproduction. AP Biology 2/27/15 Meiosis & Sexual Reproduction 2/27/15 Cell division / Asexual reproduction Mitosis u produce cells with same information identical daughter cells u exact copies clones u same amount of DNA same number

More information

Cell division / Asexual reproduction

Cell division / Asexual reproduction Cell division / Asexual reproduction Mitosis produces cells with same information identical daughter cells exact copies clones same amount of DNA same number of chromosomes same genetic information Asexual

More information

The division of a unicellular organism reproduces an entire organism, increasing the population. Here s one amoeba dividing into 2.

The division of a unicellular organism reproduces an entire organism, increasing the population. Here s one amoeba dividing into 2. 1. Cell division functions in 3 things : reproduction, growth, and repair The division of a unicellular organism reproduces an entire organism, increasing the population. Here s one amoeba dividing into

More information

Warm-Up Questions. 1. What are the stages of mitosis in order? 2. The diagram represents a cell process.

Warm-Up Questions. 1. What are the stages of mitosis in order? 2. The diagram represents a cell process. Warm-Up Questions 1. What are the stages of mitosis in order? 2. The diagram represents a cell process. Which statement regarding this process is true? A. Cell B contains the same genetic information that

More information

CELL GROWTH AND DIVISION. Chapter 10

CELL GROWTH AND DIVISION. Chapter 10 CELL GROWTH AND DIVISION Chapter 10 Cell division = The formation of 2 daughter cells from a single parent cell Increases ratio of surface area to volume for each cell Allows for more efficient exchange

More information

Human Biology Chapter 13.4: Meiosis and Genetic Variation

Human Biology Chapter 13.4: Meiosis and Genetic Variation OpenStax-CNX module: m58013 1 Human Biology Chapter 13.4: Meiosis and Genetic Variation Willy Cushwa Based on Meiosis by OpenStax This work is produced by OpenStax-CNX and licensed under the Creative Commons

More information

Meiosis. Introduction. A life cycle is the generation-to-generation sequence of stages in the reproductive history of an organism.

Meiosis. Introduction. A life cycle is the generation-to-generation sequence of stages in the reproductive history of an organism. Meiosis The pomegranate (Punica granatum) is believed to have originated near Iran and southern Afghanistan. The flowers are bright red with five petals. After the flower is fertilized with pollen the

More information

Almost all human cells contain 46 chromosomes, and are diploid (2n). Q: If a sperm cell has 46 chromosomes (2n) & an egg cell has 46 chromosomes

Almost all human cells contain 46 chromosomes, and are diploid (2n). Q: If a sperm cell has 46 chromosomes (2n) & an egg cell has 46 chromosomes Almost all human cells contain 46 chromosomes, and are diploid (2n). Q: If a sperm cell has 46 chromosomes (2n) & an egg cell has 46 chromosomes (2n), when they combine during fertilization, how many chromosomes

More information

gametes Gametes somatic cells diploid (2n) haploid (n)

gametes Gametes somatic cells diploid (2n) haploid (n) Overview of Meiosis Meiosis is a form of cell division that leads to the production of gametes. Gametes: egg cells and sperm cells (reproductive) -contain half the number of chromosomes of an adult body

More information

Meiosis vs Mitosis. How many times did it go through prophase-metaphase-anaphase-telophase?

Meiosis vs Mitosis. How many times did it go through prophase-metaphase-anaphase-telophase? Meiosis vs Mitosis Mitosis produces identical copies of cells for growth or repair. Meiosis produces egg cells or sperm cells. Look at the diagram of meiosis: What happened during prophase I? How many

More information

Cell division / Asexual reproduction. Asexual reproduction. How about the rest of us? 1/24/2017. Meiosis & Sexual Reproduction.

Cell division / Asexual reproduction. Asexual reproduction. How about the rest of us? 1/24/2017. Meiosis & Sexual Reproduction. 1/24/2017 Cell division / Asexual reproduction Mitosis produce cells with same information identical daughter cells exact copies Meiosis & Sexual Reproduction clones same amount of DNA same number of chromosomes

More information

Meiosis and Sexual Life Cycles

Meiosis and Sexual Life Cycles Chapter 13 Meiosis and Sexual Life Cycles Lecture Outline Overview: Variations on a Theme Living organisms are distinguished by their ability to reproduce their own kind. Offspring resemble their parents

More information

Meiosis * OpenStax. This work is produced by OpenStax-CNX and licensed under the Creative Commons Attribution License 3.0.

Meiosis * OpenStax. This work is produced by OpenStax-CNX and licensed under the Creative Commons Attribution License 3.0. OpenStax-CNX module: m45466 1 Meiosis * OpenStax This work is produced by OpenStax-CNX and licensed under the Creative Commons Attribution License 3.0 By the end of this section, you will be able to: Abstract

More information

CH 13 Meiosis & Sexual Life Cycles

CH 13 Meiosis & Sexual Life Cycles CH 13 Meiosis & Sexual Life Cycles AP Biology 2005-2006 Cell division / Asexual reproduction Mitosis produce cells with same information identical daughter cells exact copies clones same amount of DNA

More information

Sexual Reproduction and Meiosis. Chapter 11

Sexual Reproduction and Meiosis. Chapter 11 Sexual Reproduction and Meiosis Chapter 11 1 Sexual life cycle Made up of meiosis and fertilization Diploid cells Somatic cells of adults have 2 sets of chromosomes Haploid cells Gametes (egg and sperm)

More information

Meiosis & Sexual Reproduction (Ch. 11)

Meiosis & Sexual Reproduction (Ch. 11) Meiosis & Sexual Reproduction (Ch. 11) Cell division / Asexual reproduction Mitosis produce cells with same information identical daughter cells exact copies clones same DNA Aaaargh! I m seeing double!

More information

11/18/2016. Meiosis. Dr. Bertolotti. How is meiosis different from mitosis?

11/18/2016. Meiosis. Dr. Bertolotti. How is meiosis different from mitosis? Meiosis Dr. Bertolotti How is meiosis different from mitosis? 1 3 Types of Cell Division 1. Binary fission- cell division in prokaryotes 2. Cell Cycle (with Mitosis)- cell division in eukaryotes to form

More information

Meiosis. Two distinct divisions, called meiosis I and meiosis II

Meiosis. Two distinct divisions, called meiosis I and meiosis II Meiosis A process in which the number of chromosomes per cell is cut in half through the separation of homologous chromosomes to form gametes, or sex cells Two distinct divisions, called meiosis I and

More information

Meiosis and Sexual Reproduction. Chapter 9

Meiosis and Sexual Reproduction. Chapter 9 Meiosis and Sexual Reproduction Chapter 9 9.1 Genes and Alleles Genes Sequences of DNA that encode heritable traits Alleles Slightly different forms of the same gene Each specifies a different version

More information

Purposes of Cell Division

Purposes of Cell Division Purposes of Cell Division Increase the number of cells for growth and repair of worn out tissues What examples in the human body can you think of? Transmit genetic information to later generations Why

More information

biology Slide 1 of 35 End Show Copyright Pearson Prentice Hall

biology Slide 1 of 35 End Show Copyright Pearson Prentice Hall biology 1 of 35 Do Now: Turn in mitosis worksheet Write down your homework http://www.richannel.org/collection s/2013/chromosome#/chromosome -2 http://www.richannel.org/collection s/2013/chromosome#/chromosome

More information

Meiosis & Sexual Reproduction

Meiosis & Sexual Reproduction Meiosis & Sexual Reproduction 2007-2008 Cell division / Asexual reproduction Mitosis u produce cells with same information identical daughter cells u exact copies clones u same amount of DNA same number

More information

Warm up. sexual life cycle. 1. Compare sexual to asexual reproduction. 2. What are homologous chromosomes?

Warm up. sexual life cycle. 1. Compare sexual to asexual reproduction. 2. What are homologous chromosomes? Warm up 1. Compare sexual to asexual reproduction. 2. What are homologous chromosomes? 1. Describe what major processes occur during a sexual life cycle. Warm up 1. Describe what occurs during crossing

More information

Benchmark Clarification for SC.912.L.16.17

Benchmark Clarification for SC.912.L.16.17 Benchmark Clarification for SC.912.L.16.17 Students will: Differentiate the process of meiosis and meiosis Describe the role of mitosis in asexual reproduction, and/or the role of meiosis in sexual reproduction,

More information

11-4 Meiosis Meiosis. Slide 1 of 35. Copyright Pearson Prentice Hall

11-4 Meiosis Meiosis. Slide 1 of 35. Copyright Pearson Prentice Hall 11-4 Meiosis 1 of 35 Each organism must inherit a single copy of every gene from each of its parents. Gametes are formed by a process that separates the two sets of genes so that each gamete ends up with

More information

Meiosis & Sexual Life Cycle

Meiosis & Sexual Life Cycle Chapter 13. Meiosis & Sexual Life Cycle 1 Cell reproduction Mitosis produce cells with same information identical daughter cells exact copies (clones) same amount of DNA same number of chromosomes asexual

More information

Sexual Reproduction ( Cell Division ) - Chromosome # s

Sexual Reproduction ( Cell Division ) - Chromosome # s Sexual Reproduction ( Cell Division ) - Chromosome # s somatic cells: all the cells in the body except for specialized sex cells each somatic cell has a specific # of chromosomes - ( humans have 46, 23

More information

Anaphase, Telophase. Animal cells divide their cytoplasm by forming? Cleavage furrow. Bacteria, Paramecium, Amoeba, etc. reproduce by...

Anaphase, Telophase. Animal cells divide their cytoplasm by forming? Cleavage furrow. Bacteria, Paramecium, Amoeba, etc. reproduce by... The 4 phases of mitosis Animal cells divide their cytoplasm by forming? Bacteria, Paramecium, Amoeba, etc. reproduce by... Cell which after division is identical to the original is called a Prophase, Metaphase,

More information

Binary fission occurs in prokaryotes. parent cell. DNA duplicates. cell begins to divide. daughter cells

Binary fission occurs in prokaryotes. parent cell. DNA duplicates. cell begins to divide. daughter cells Chapter 11 Chapter 11 Some eukaryotes reproduce through mitosis. Binary fission is similar in function to mitosis. Asexual reproduction is the creation of offspring from a single parent. Binary fission

More information