4/15/16. Planner: Missing work & Retakes! Table of Contents # Quiz Review Do-Now. Biology
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1 Biology Monday, April 11, 2016 Do-Now: 6.1 Quiz Review Do-Now 1. Write down today s FLT 2. Dis?nguish between the following terms: a. Gametes and Soma-c Cells b. Haploid and Diploid Cells c. Autosomes and Sex Chromosomes 3. What is meiosis? Finished? Take out your planner and ToC. Announcements Turn in missing work! Retake tests/quizzes! Yay Q4! Planner: Missing work & Retakes! Table of Contents # Quiz Review Do-Now Standard HS-LS 3-2 Make and defend a claim based on evidence that inheritable genetic variations may result from: (1) new genetic combinations through meiosis, (2) viable errors occurring during replication, and/ or (3) mutations caused by environmental factors. FLT I will be able to demonstrate my understanding of chromosomes by completing 6.1 Quiz 1
2 Biology Tuesday, April 12 Wednesday, April 13, 2016 Do-Now: BrainPOP: Gene?cs 1. Write down today s FLT 2. DNA is found in the. 3. There are two types of chromosomes: and. 4. cells have two copies of each chromosome, while cells have only one copy of each. 5. The process of is when a cell divides twice to produce gametes Finished? Take out your planner and ToC. Announcements Turn in missing work! Yay Q4! Finish packet Planner: Table of Contents # Quiz Review Do-Now 8. BrainPOP: Genetics 9. Meiosis Packet BrainPoP! We will watch a BrainPOP video to introduce genetics Noise level 0 After the clip, we will answer the quiz questions UNDERNEATH THE Do-Now science/cellularlifeandgenetics/ genetics/ Standard HS-LS 3-2 Make and defend a claim based on evidence that inheritable genetic variations may result from: (1) new genetic combinations through meiosis, (2) viable errors occurring during replication, and/ or (3) mutations caused by environmental factors. FLT I will be able to overview the process of meiosis by completing Meiosis Packet 2
3 CW Open your reading packets to 6.2 or your books to page 274 Page 1: Diagram the steps (star?ng with prophase I) and briefly describe Page 2: Cut out the cells. Figure out the correct order (star?ng with prophase I). Glue and label steps on blank paper. Biology Thursday, April 14 Friday, April 15, 2016 Do-Now: Packet 1. Complete the do-now on the packet provided. Use your 6.1 Power Notes/Reading Packet if needed Announcements Turn in missing work! Schedule retakes! Finished? Take out your planner and ToC. 6.2 Quiz Monday Planner: Table of Contents # Meiosis Notes Study Guide Video Notes Watch the video clip about meiosis As you watch, answer the ques?ons under the do-now (front and back) We will share out aaer the video 3
4 Standard HS-LS 3-2 Make and defend a claim based on evidence that inheritable genetic variations may result from: (1) new genetic combinations through meiosis, (2) viable errors occurring during replication, and/ or (3) mutations caused by environmental factors. FLT I will be able to describe the functions and stages of meiosis by completing Power Notes 6.2 Cornell Notes : Process of Meiosis Key concept: During meiosis, diploid cells undergo two cell divisions that result in haploid cells Recall Recall: What are our two cell types? Recall 4
5 4/15/16 Recall What are chromosomes? Which one is haploid and which one is diploid? Mitosis vs. Meiosis Meiosis Overview Meiosis Overview Meiosis = form of cell division that produces haploid gametes. Two total divisions. Meiosis Overview Meiosis occurs in sexually reproducing organisms Meiosis occurs in the testes or ovaries Produces sperm cells and egg cells 5
6 Gametes have half the number of chromosomes (haploid) Fertilization = sperm cell + egg cell combine to form a diploid zygote Meiosis Overview Interphase: Pre-step Interphase = pre-step = DNA replicates & condenses into chromosomes Two Divisions Two Divisions Meiosis à 2 divisions à 4 total = 1 st division I = 2 nd division : First Division 6
7 After interphase, meiosis occurs divides homologous chromosomes in PMAT I Four phases of : 1. Prophase I 2. Metaphase I 3. Anaphase I 4.Telophase I 1. Prophase I: Homologous chromosomes pair up and crossing over occurs (they swap DNA segments) Prophase I Homologous Chromosomes (same type) pair up The homologous chromosomes line up and exchange DNA pieces à this creates genetic diversity Crossing over J 7
8 2. Metaphase I: Tetrads line up 2. Metaphase I 3. Anaphase I: Homologous chromosome pairs separate 4. Telophase I: Cell divides into two I: Second Division 8
9 Two Divisions I: Add to the side I = very similar to mitosis DNA is not copied between divisions 5. Prophase II 6. Metaphase II 7. Anaphase II: Sister chromatids separate 8. Telophase II I I Gametogenesis 9
10 Oogenesis Oogenesis = production of female eggs Only one egg cell made Nutrients go to ONE cell during division. Other cells form polar bodies that disintegrate :( Only one haploid egg cell is produced. Importance Meiosis Overview Outcomes of Meiosis: Makes gametes Reduces chromosome number (diploid à haploid) Creates genetic diversity 10
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