Meiosis. Nature s Design of Genetic Variability

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "Meiosis. Nature s Design of Genetic Variability"

Transcription

1 Meiosis Nature s Design of Genetic Variability

2 Mitosis vs Meiosis Characteristics!!! Mitosis Meiosis Purpose Location Number of Cells at End Human (start) Human (end) Number of Chromosomes

3 Homologous Chromosome vs. Sister Chromatids What are homologous chromosomes? of chromosomes that have same of One from the (maternal) and one from the (paternal) Ex. Humans have 23 pairs. Both chromosome 11 from mom and dad have gene for, but can have different of the (normal or sickle shape).

4 Homologous Chromosome vs. Sister Chromatids **Don t confuse homologous chromosomes with copy of made during interphase Must have the same form

5 Diploid and Haploid Diploid- having a of each ( sets of ) or cells are diploid (all human cells sperm/egg are diploid) = Diploid Number In humans, 2n = Haploid- having a set of ( set of ) and cells are haploid = Haploid Number In humans, n =

6 Diploid and Haploid

7 Chromosome Painting A is an organized of pairs of chromosome Humans have chromosomes pairs of pair of chromosomes

8 Human Reproduction Meiosis allows to pass on of their chromosomes. In Women: an is formed from the

9 Human Reproduction Meiosis allows to pass on of their chromosomes. In Men: is formed from the

10 Steps of Meiosis

11 Meiosis I Reducing the # of in per Cell first has to double the # of chromosomes in which phase? Enters into Meiosis I is formed Structure that is formed when chromosomes pair with another set of chromosomes Two chromosomes pair up.

12 Meiosis II After meiosis I there are daughter cells with the number of chromosomes as the cell does not take place again does not take place : chromosomes and nuclear envelope.

13 Meiosis II : chromosomes in the of the cell : from each other; move to ends of the cell : new daughter cells are formed.

14 Mistakes During Meiosis The of chromosomes to during and after meiosis. Daughter cells have an number of chromosomes One cell has chromosomes Other cell has.

15 Mistakes during Meiosis: Nondisjunction

16 What Disorder is This?

17 What Disorder is This?

18 Meiosis Example! (Box = Cell) 1) Interphase (early)! 2) Interphase (end) 3) Prophase I! 2n = 6 4) Metaphase I! * homologous pairs line up next to each other vs. below one another in mitosis 5) Anaphase I! * homologous pairs separate! vs. sister chromatids in! mitosis!!! 6) Telophase I/ Cytokinesis! * 2 new cells that are haploid (n = 3 )vs. 2 new cells diploid in mitosis!

19 Meiosis Example! (Box = Cell) 7) Prophase II 5) Anaphase I! * chromosomes line up sister chromatids separate (like in anaphase in mitosis) 8) Metaphase II! * chromosomes line up (Just like in Metaphase in Mitosis!) 10) Telophase I/ Cytokinesis! * ends with 4 new cells EACH with HALF CHROMOSOMES as original (n= 3)

20 Stages of Meiosis Review Meiosis I! DNA up Prophase I Homologous chromosomes occurs Metaphase I line up down the center, across from their pair ( doesn t mater) Anaphase I / Telophase I Chromosomes apart, form daughter cells

21 Stages of Meiosis Review Meiosis II! Prophase II Chromosomes once again Metaphase II Chromosomes line up in the of their cell Anaphase II The individual are pulled to sides of cell Telophase / cytokinesis new cells are formed 4 or 1 and 3

22 Review of Meiosis Makes haploid cells Meiosis I: Separate Meiosis II: Separate

23 What to Know About Meiosis Be able to describe the alignment of chromosomes DNA Vocab Homologous Tetrad Crossing over Sister chromatids

24 Three Most Important Facts About Meiosis! Your genes become mixed-up ( ) Cells become (contain the normal amount of chromosomes) cell become daughter cells

25 Why Would It Be Important To Have Your Genes Rearranged? When you shuffle genes it is known as having: Helps with to Helps with change as well Greater of

26 Advantages of Sexual Reproduction Three Ways Meiosis Creates of

27 The process of random segregation and assortment of chromosomes Occurs during I of meiosis Results in the production of. Law of Independent Assortment

28 Occurs during / (Tetrad)_ chromosomes pair up and segments of their material. Crossing Over of chromosomes pair up during - Forms X-structure ( ). Chromatids break into regions and are with one another. Results in combinations of that are different from either. Contributes to.

29 Fertilization What forms as the result of fertilization? A (fertilized egg). Sperm enters egg and join How does a zygote differ from a sperm or an egg? It is a rather than a cell.

30 Random Fertilization How does random fertilization lead to diversity?

31

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

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 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

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

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

Lesson Overview Meiosis

Lesson Overview Meiosis 11.4 Chromosomes strands of DNA and protein contain the genes. genes are located in specific positions on chromosomes. Humans receive a set (23) of chromosomes from each parent. 23 chromosomes from mom

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

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

9-4 Meiosis Meiosis. Slide 1 of 35

9-4 Meiosis Meiosis. Slide 1 of 35 9-4 Meiosis 11-4 Meiosis 1 of 35 11-4 Meiosis 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

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

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. The two parent cells needed for sexual reproduction are called gametes. They are formed during a process known as meiosis.

Sexual Reproduction. The two parent cells needed for sexual reproduction are called gametes. They are formed during a process known as meiosis. Sexual Reproduction Recall that asexual reproduction involves only one parent cell. This parent cell divides to produce two daughter cells that are genetically identical to the parent. Sexual reproduction,

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

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. 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

What is Mitosis? What is the purpose of Mitosis? Growth Repair Asexual reproduction What is the ultimate result of Mitosis?

What is Mitosis? What is the purpose of Mitosis? Growth Repair Asexual reproduction What is the ultimate result of Mitosis? Sexual Reproduction What is Mitosis? What is the purpose of Mitosis? Growth Repair Asexual reproduction What is the ultimate result of Mitosis? http://www.youtube.com/watch?v=1fyfdfdrymq Somatic cells

More information

4/6/2014. Chromosome Number

4/6/2014. Chromosome Number Meiosis 1of 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 just

More information

Meiosis. Section 8-3

Meiosis. Section 8-3 Meiosis Section 8-3 Meiosis process of nuclear division that reduces the number of chromosomes in new cells to half the number in the original cell For example, in humans, meiosis produces haploid reproductive

More information

11-4 Meiosis Chromosome Number Slide 1 of 35

11-4 Meiosis Chromosome Number Slide 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 just one set. Chromosome

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

Lesson Overview Meiosis

Lesson Overview Meiosis 11.4 THINK ABOUT IT As geneticists in the early 1900s applied Mendel s laws, they wondered where genes might be located. They expected genes to be carried on structures inside the cell, but which structures?

More information

Question #1 What must occur in order for Mendel s principles to hold true?

Question #1 What must occur in order for Mendel s principles to hold true? 11.4 Question #1 What must occur in order for Mendel s principles to hold true? An organism with two parents must inherit a single copy of every gene from each parent When that organism produces gametes,

More information

Typical Life Cycle of Algae and Fungi. 5 Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

Typical Life Cycle of Algae and Fungi. 5 Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Module 3B Meiosis and Sexual Life Cycles In this module, we will examine a second type of cell division used by eukaryotic cells called meiosis. In addition, we will see how the 2 types of eukaryotic cell

More information

WarmUp 1. C. a phosphate group is removed

WarmUp 1. C. a phosphate group is removed WarmUp 1 1. Energy is released from ATP when C. a phosphate group is removed 2. During normal mitotic cell division, a parent cell with four chromosomes will produce two daughter cells, each containing-

More information

Parents can produce many types of offspring. Families will have resemblances, but no two are exactly alike. Why is that?

Parents can produce many types of offspring. Families will have resemblances, but no two are exactly alike. Why is that? Parents can produce many types of offspring Families will have resemblances, but no two are exactly alike. Why is that? Meiosis and Genetic Linkage Objectives Recognize the significance of meiosis to sexual

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

MGC New Life Christian Academy

MGC New Life Christian Academy A. Meiosis Main Idea: Meiosis produces haploid gametes. Key Concept: Asexual reproduction involves one parent and produces offspring that are genetically identical to each other and to the parent. Sexual

More information

Cell Division (Meiosis)

Cell Division (Meiosis) Cell Division (Meiosis) Meiosis The form of cell division by which gametes, with half the number of chromosomes, are produced. Diploid (2n) haploid (n) Meiosis is sexual reproduction. Two divisions (meiosis

More information

MEIOSIS CELL DIVISION Chapter

MEIOSIS CELL DIVISION Chapter Section 6.1: Meiosis MEIOSIS CELL DIVISION Chapter 6.1 6.2 WHAT DETERMINES WHAT YOU LOOK LIKE? Meiosis Animation Meiosis creates 4 genetically different gametes (haploid) Mitosis creates 2 identical daughter

More information

GENES, ALLELES, AND CHROMOSOMES All living things carry their genetic information in DNA Sections of DNA with instructions for making proteins are

GENES, ALLELES, AND CHROMOSOMES All living things carry their genetic information in DNA Sections of DNA with instructions for making proteins are GENES, ALLELES, AND CHROMOSOMES All living things carry their genetic information in DNA Sections of DNA with instructions for making proteins are called genes DNA coils up to form structures called chromosomes

More information

Name Class Date. Term Definition How I m Going to Remember the Meaning

Name Class Date. Term Definition How I m Going to Remember the Meaning 11.4 Meiosis Lesson Objectives Contrast the number of chromosomes in body cells and in gametes. Summarize the events of meiosis. Contrast meiosis and mitosis. Describe how alleles from different genes

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

11.4 Meiosis. Vocabulary: Homologous Diploid Haploid Meiosis Crossing-over Tetrad

11.4 Meiosis. Vocabulary: Homologous Diploid Haploid Meiosis Crossing-over Tetrad 11.4 Meiosis Vocabulary: Homologous Diploid Haploid Meiosis Crossing-over Tetrad Key Concept: What happens during the process of meiosis? How is MEIOSIS different than mitosis? Blast from the past What

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

Review of Terms. Haploid cells (1n) with one copy of each chromosome. Diploid cells (2n) with two copies of each chromosome

Review of Terms. Haploid cells (1n) with one copy of each chromosome. Diploid cells (2n) with two copies of each chromosome Review of Terms Haploid cells (1n) with one copy of each chromosome Diploid cells (2n) with two copies of each chromosome Somatic non-germline cells Gametes sex cells (eggs and sperm) Reductional division

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

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 Why do you look a little like your mom and your dad? Why do you look a little like your grandma but your brother or sister looks a little like your grandpa? How is the way you look and

More information

Chapter 6: Mendel and Meiosis Meiosis Gamete Production Lecture Guide

Chapter 6: Mendel and Meiosis Meiosis Gamete Production Lecture Guide Chromosomes and Meiosis Specialized cells in the body Chromosomes 2 types: Chapter 6: Mendel and Meiosis Meiosis Gamete Production Lecture Guide (body cells) Makes up your DNA in your body cells passed

More information

Cellular Reproduction. MXMS 7th Grade Science

Cellular Reproduction. MXMS 7th Grade Science Cellular Reproduction MXMS 7th Grade Science What is cell division? 2 primary methods allow for cells to divide and reproduce themselves: A. Mitosis: produces identical offspring B. Meiosis: produces genetically

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

CELL DIVISION: MEIOSIS

CELL DIVISION: MEIOSIS CELL DIVISION: MEIOSIS How do Organisms Reproduce? Option 1: Asexual Reproduction Can be done by a single organism without the involvement of gametes (sperm or egg) Offspring are clones of the parent,

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

The Cell Cycle & Cell Division

The Cell Cycle & Cell Division The Cell Cycle & Cell Division http://www.nobel.se/medicine/laureates/2001/press.html The Cell Cycle Animated Cycle http://www.cellsalive.com/cell_cycle.htm MITOSIS Mitosis The process of cell division

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

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

Learning Objectives:

Learning Objectives: Review! Why is cell division important?! What are the different types of cell division?! What are these useful for?! What are the products?! What is a somatic cell?! What is a sex cell?! What is a haploid

More information

CELL DIVISION IN EUKARYOTES. Professor Andrea Garrison Biology 11 Illustrations 2010 Pearson Education, Inc.

CELL DIVISION IN EUKARYOTES. Professor Andrea Garrison Biology 11 Illustrations 2010 Pearson Education, Inc. CELL DIVISION IN EUKARYOTES Professor Andrea Garrison Biology 11 Illustrations 2010 Pearson Education, Inc. PURPOSE: Reproduction of new cells from previously existing cells 2 of Genetically Identical

More information

Meiosis: M-Phase part 2. How is meiosis different from mitosis? Some terms: Some terms: Some terms:

Meiosis: M-Phase part 2. How is meiosis different from mitosis? Some terms: Some terms: Some terms: M-Phase part 2 Meiosis and Cytokinesis Meiosis: A special type of cell division that produces gametes. Cell division that occurs in sex organs. 2 successive nuclear divisions Genetic mistakes (gene and

More information

4 Metaphase I 4 Anaphase I 4 Telophase I 2/4 Prophase II 2 Metaphase II 2 Anaphase II 2 Telophase II 2 Cytokinesis 2

4 Metaphase I 4 Anaphase I 4 Telophase I 2/4 Prophase II 2 Metaphase II 2 Anaphase II 2 Telophase II 2 Cytokinesis 2 Meiosis What therefore God hath joined together, let not man put asunder Mark 10:6-9 Stage Table 1 Meiosis (Without Crossover Event) # Chromosomes Per Cell Prophase I 4 Metaphase I 4 Anaphase I 4 Telophase

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

SCIENCE M E I O S I S

SCIENCE M E I O S I S SCIENCE 9 6. 1 - M E I O S I S OBJECTIVES By the end of the lesson you should be able to: Describe the process of meiosis Compare and contrast meiosis and mitosis Explain why meiosis is needed MEIOSIS

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

Cells Divide, and Cells Die

Cells Divide, and Cells Die Meiosis Cells Divide, and Cells Die Your cells are rapidly dying and being replaced. Cell division produces a continuous supply of replacement cells. Cell division also has a role in reproduction, growth,

More information

CELL REPRODUCTION NOTES

CELL REPRODUCTION NOTES CELL REPRODUCTION NOTES CELL GROWTH AND DIVISION The adult human body produces roughly cells every day. WHY DO CELLS REPRODUCE? So that the organism can and As multicellular organisms grow larger, its

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

3/25/2013 LIVING ORGANISMS MEIOSIS CHROMOSOME NUMBER. 2 types of cells: Autosomal (body) cells have 2 copies of every gene

3/25/2013 LIVING ORGANISMS MEIOSIS CHROMOSOME NUMBER. 2 types of cells: Autosomal (body) cells have 2 copies of every gene LIVING ORGANISMS 2 types of cells: Autosomal (body) cells have 2 copies of every gene MEIOSIS Genetics Unit Gametes (sex) cells have 1 copy of every gene CHROMOSOME NUMBER Autosomal (body) cells Humans

More information

MEIOSIS. Making gametes

MEIOSIS.  Making gametes MEIOSIS http://waynesword.palomar.edu/lmexer2a.htm Making gametes Remember from Chapter 1: CHARACTERISTICS OF LIVING THINGS ALL LIVING THINGS REPRODUCE Planaria animation: http://www.t3.rim.or.jp/~hylas/planaria/title.htm

More information

Meiosis. The sexy shuffling machine. LO: Describe the events of meiosis Explain how meiosis creates uniqueness Compare & contrast mitosis & meiosis

Meiosis. The sexy shuffling machine. LO: Describe the events of meiosis Explain how meiosis creates uniqueness Compare & contrast mitosis & meiosis Meiosis The sexy shuffling machine LO: Describe the events of meiosis Explain how meiosis creates uniqueness Compare & contrast mitosis & meiosis http://www.youtube.com/watch?v=kvmb4js99ta Meiosis Intro

More information

6-10 Sexual reproduction requires special cells (gametes) made by meiosis.

6-10 Sexual reproduction requires special cells (gametes) made by meiosis. Do Now Answer the following questions: For every cell undergoing mitosis, how many cells are created? For a cell with 6 chromosomes, how many chromosomes are in the daughter cells? Why are daughter cells

More information

1. The process in which ( ) are produced. 2. Males produce cells and females produce cells through meiosis

1. The process in which ( ) are produced. 2. Males produce cells and females produce cells through meiosis Name: Aim 35: What is Meiosis? Date: I. What is Meiosis? What is Meiosis? Which organisms undergo Meiosis? Where does Meiosis occur? What does Meiosis produce? What is Meiosis also known as? 1. The process

More information

2. Next, try to describe the cell cycle as follows: interphase, prophase, metaphase, anaphase, telophase, cytokinesis

2. Next, try to describe the cell cycle as follows: interphase, prophase, metaphase, anaphase, telophase, cytokinesis 1. First, tell me something exciting you did over spring break! 2. Next, try to describe the cell cycle as follows: interphase, prophase, metaphase, anaphase, telophase, cytokinesis *Reminder*-Thursday

More information

chromosomes found in the somatic (body) cells of an organism is reduced by half to form the sex cells, egg & sperm. chromosomes.

chromosomes found in the somatic (body) cells of an organism is reduced by half to form the sex cells, egg & sperm. chromosomes. MEIOSIS n Meiosis q The process by which the number of chromosomes found in the somatic (body) cells of an organism is reduced by half to form the sex cells, egg & sperm. q Somatic cells have 46 chromosomes.

More information

Sexual Cell Reproduction Chapter 17

Sexual Cell Reproduction Chapter 17 Sexual Cell Reproduction Chapter 17 1 The Importance of Meiosis Meiosis is a two stage cell division in which the chromosome number of the parental cell is reduced by half. Meiosis is the process by which

More information

MEIOSIS LAB INTRODUCTION PART I: MEIOSIS

MEIOSIS LAB INTRODUCTION PART I: MEIOSIS MEIOSIS LAB INTRODUCTION Meiosis involves two successive nuclear divisions that produce four haploid cells. Meiosis I is the reduction division. It is this first division that reduces the chromosome number

More information

Sexual life cycle. Sexual life cycle. Fertilization. Sexual Reproduction and Meiosis. Made up of meiosis and fertilization Diploid cells (2n)

Sexual life cycle. Sexual life cycle. Fertilization. Sexual Reproduction and Meiosis. Made up of meiosis and fertilization Diploid cells (2n) Sexual life cycle Sexual Reproduction and Meiosis Made up of meiosis and fertilization Diploid cells (2n) Chapter 11 Somatic cells of adults have 2 sets of Haploid cells (n) Gametes have only 1 set of

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

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

Meiosis. The making of sex cells (sperm & egg).

Meiosis. The making of sex cells (sperm & egg). Meiosis The making of sex cells (sperm & egg). Meiosis (continued) 2 Meiosis I 2n 1n Prophase I Metaphase I Anaphase I Telophase I - Homologous Chromosomes line up at equator - Homologous Chromosomes pull

More information

CHAPTER 3 VOCABULARY (for now)

CHAPTER 3 VOCABULARY (for now) 3.1 Meiosis CHAPTER 3 VOCABULARY (for now) VOCABULARY WORD VOCABULARY WORD diploid number Independent assortment haploid number gametes homologous chromosomes zygote genetic diversity Crossing over Sexual

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

Lesson Overview Meiosis

Lesson Overview Meiosis 11.4 As geneticists in the early 1900s applied Mendel s laws, they wondered where genes might be located. They expected genes to be carried on structures inside the cell, but which structures? What cellular

More information

THINK ABOUT IT. Lesson Overview. Meiosis. As geneticists in the early 1900s applied Mendel s laws, they wondered where genes might be located.

THINK ABOUT IT. Lesson Overview. Meiosis. As geneticists in the early 1900s applied Mendel s laws, they wondered where genes might be located. Notes THINK ABOUT IT As geneticists in the early 1900s applied Mendel s laws, they wondered where genes might be located. They expected genes to be carried on structures inside the cell, but which structures?

More information

Mitosis Verses Meiosis

Mitosis Verses Meiosis Mitosis Verses Meiosis Name LT: I can compare mitosis and meiosis using various resources. Standards: 4.1b, 4.1c Visit the following links: https://www.youtube.com/watch?v=f-ldpgefahi https://www.youtube.com/watch?v=vzdmg7ke69g

More information

Chapter 10.2 Notes. Genes don t exist free in the nucleus but lined up on a. In the body cells of animals and most plants, chromosomes occur in

Chapter 10.2 Notes. Genes don t exist free in the nucleus but lined up on a. In the body cells of animals and most plants, chromosomes occur in Chapter 10.2 Notes NAME Honors Biology Organisms have tens of thousands of genes that determine individual traits Genes don t exist free in the nucleus but lined up on a Diploid and Haploid Cells In the

More information

What is mitosis? -Process in which a cell divides, creating TWO complete Sets of the original cell with the same EXACT genetic Material (DNA)

What is mitosis? -Process in which a cell divides, creating TWO complete Sets of the original cell with the same EXACT genetic Material (DNA) What is mitosis? -Process in which a cell divides, creating TWO complete Sets of the original cell with the same EXACT genetic Material (DNA) Cell Division Produces CLONES with the same # of chromosomes

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

Meiosis B-4.5. Summarize the characteristics of the phases of meiosis I and meiosis II.

Meiosis B-4.5. Summarize the characteristics of the phases of meiosis I and meiosis II. Meiosis B-4.5 Summarize the characteristics of the phases of meiosis I and meiosis II. Key Concepts Daughter cells Diploid Haploid Zygote Gamete Meiosis I vs. Meiosis II What You Already Know This concept

More information

Lesson Overview 11.4 Meiosis

Lesson Overview 11.4 Meiosis Lesson Overview 11.4 Meiosis THINK ABOUT IT As geneticists in the early 1900s applied Mendel s laws, they wondered where genes might be located. They expected genes to be carried on structures inside the

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

Meiosis produces haploid gametes.

Meiosis produces haploid gametes. Section 1: produces haploid gametes. K What I Know W What I Want to Find Out L What I Learned Essential Questions How does the reduction in chromosome number occur during meiosis? What are the stages of

More information

Bell Ringer 02/02/15. Match the stages of mitosis to their descriptions and pictures.

Bell Ringer 02/02/15. Match the stages of mitosis to their descriptions and pictures. Match the stages of mitosis to their descriptions and pictures. 1. Nuclear membrane disappears and chromosomes condense 2. Nuclear membrane reappears and cells begin to fully separate Bell Ringer 02/02/15

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

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

Name: Date: Period: Cell Cycles and DNA Study Guide

Name: Date: Period: Cell Cycles and DNA Study Guide Name: Date: Period: DNA (Deoxyribonucleic Acid) is the chemical inside the nucleus of cells that contains hereditary information. DNA is shaped like a double helix/twisted ladder. The sides of the ladder

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

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

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 Sexual Reproduction. Chapter 10. Halving the Chromosome Number. Homologous Pairs

Meiosis and Sexual Reproduction. Chapter 10. Halving the Chromosome Number. Homologous Pairs Meiosis and Sexual Reproduction Chapter 10 Outline Reduction in Chromosome Number Homologous Pairs Meiosis Overview Genetic Recombination Crossing-Over Independent Assortment Fertilization Meiosis I Meiosis

More information

Mitosis & Meiosis. PPT Questions. 4. Why must each new cell get a complete copy of the original cell s DNA?

Mitosis & Meiosis. PPT Questions. 4. Why must each new cell get a complete copy of the original cell s DNA? 1. From where do new cells arise? Mitosis & Meiosis PPT Questions 2. Why does the body constantly make new cells? 3. Is cell division the same in all cells? Explain. 4. Why must each new cell get a complete

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

Chapter 13. Meiosis and Sexual Life Cycles. Chromosome number. An Overview of Meiosis. Overview of Meiosis

Chapter 13. Meiosis and Sexual Life Cycles. Chromosome number. An Overview of Meiosis. Overview of Meiosis Chapter 13 and Sexual Life Cycles Chromosome number Human cells Diploid 46 total per cell 46 Diploid number Humans cells 23 pairs of homologous 23 Haploid number The number of different kinds of An Overview

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

Ch. 10 Sexual Reproduction and Genetics. p

Ch. 10 Sexual Reproduction and Genetics. p Ch. 10 Sexual Reproduction and Genetics p. 270 - 10.1 Meiosis p. 270-276 Essential Question Main Idea! Meiosis produces haploid gametes Where are the instructions for each trait located in a cell?! On

More information

KEY CONCEPT Cells have distinct phases of growth, reproduction, and normal functions.

KEY CONCEPT Cells have distinct phases of growth, reproduction, and normal functions. 5.1 10.1 The Cell Cell Growth Cycle KEY CONCEPT Cells have distinct phases of growth, reproduction, and normal functions. 5.1 10.1 The Cell Cell Growth Cycle Why must cells divide? Growth and Repair -

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

T R L J. Version 2, 2018 NAME: OPTION GROUP: CELL DIVISION MEIOSIS WORKBOOK

T R L J. Version 2, 2018 NAME: OPTION GROUP: CELL DIVISION MEIOSIS WORKBOOK NAME: OPTION GROUP: CELL DIVISION MEIOSIS WORKBOOK 1 STUDY CHECKLIST AND ASSESSMENT OBJECTIVES Instructions Regular revision throughout the year is essential. It s vital you keep a track of what you understand

More information

Cell Reproduction Review

Cell Reproduction Review Name Date Period Cell Reproduction Review Explain what is occurring in each part of the cell cycle --- G 0, G1, S, G2, and M. 1 CELL DIVISION Label all parts of each cell in the cell cycle and explain

More information

Lecture 9: Readings: Chapter 20, pp ;

Lecture 9: Readings: Chapter 20, pp ; Lecture 9: Meiosis i and heredity Readings: Chapter 20, pp 659-686; skim through pp 682-3 & p685 (but just for fun) Chromosome number: haploid, diploid, id polyploid l Talking about the number of chromosome

More information

Mitosis & Meiosis Practice Test

Mitosis & Meiosis Practice Test Name: DO NOT WRITE ON THIS TEST Class: ALL ID: A Mitosis & Meiosis Practice Test Modified True/False Indicate whether the statement is true or false. If false, change the identified word or phrase to make

More information

MEIOSIS. KEY CONCEPT Gametes have half the number of chromosomes that body cells have.

MEIOSIS. KEY CONCEPT Gametes have half the number of chromosomes that body cells have. MEIOSIS MEIOSIS KEY CONCEPT Gametes have half the number of chromosomes that body cells have. MEIOSIS : CELL TYPES You have Body cells and Gametes Body cells are also called somatic cells. Germ cells develop

More information