non achieve cell division SS24 (1)

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Feb 20, 2024

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IBIO 341 Non-Achieve Meiosis Homework NAME_____________________ 1. Below shows a simplified version of a cell dividing through meiosis whose genotype would be “Gg”. In the circles below, diagram how the chromosomes divide through meiosis by illustrating how chromosomes would align along the metaphase plate (dashed line) prior to anaphase for both meiosis I and meiosis II, and then the resulting gametes. Show replicated chromosomes where appropriate and be sure to include alleles. Assume no recombination. 2. Draw a cell in Anaphase of MITOSIS: 3. How is anaphase of mitosis different from anaphase of meiosis II? Make sure you use the correct terminology in your answer. 4. How does your answer change if we ask about anaphase of meiosis I? Meiosis I g G Meiosis II Gametes

IBIO 341 Meiosis Homework NAME_____________________ 5 ) You are studying a diploid organism (2N = 4) to learn more about meiosis. You are following three markers in this cell (G, A, and H). G and A are both on chromosome 1, but H is on chromosome 2. You have an individual heterozygous for G and H, and homozygous dominant for A, you may choose how the alleles are configured (i.e. there are multiple answers). a) Draw the cell in interphase, before DNA synthesis, with condensed chromosomes (even though we know they are not condensed at this stage): b) Draw the cell aligning in metaphase I if no recombination took place within prophase I (be sure to draw the metaphase plate): c) How many chromosomes are present in each cell after meiosis I is finished? How many copies of the G gene are present in each cell ? d) Using the alignment you drew in part b, draw the gametes showing all cells produced with labeled chromosomes.

IBIO 341 Meiosis Homework NAME_____________________ e) Draw the cell again in metaphase I, but this time illustrate independent assortment relative to your alignment in part b (again no recombination occurred; be sure to draw the metaphase plate). f) Using the configuration above in part e, draw both cells aligning in metaphase II (be sure to draw the metaphase plate). g ) Based on your results from part e, draw the 4 gametes produced. h ) Compare the genotypes of the gametes that you modeled in parts d) and g) with the list of ALL possible gamete genotypes for an GgAAHh individual. Do you see all the possible genotypes in your parts d) and g) models? Why or why not? i ) Draw the expected cell products from mitosis of the cell described at the beginning of this problem and compare the outcomes of mitosis and meiosis.

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