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Wi09 Homework 2 key

Wi09 Homework 2 key - Genetics Homework#2 key 1 Drosophila...

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Unformatted text preview: Genetics Homework #2 key 1. Drosophila vin'Iis is a diploid organism with 6 pairs of chromosomes (12 chromosomes altogether). How many chromatids and chromosomes are present in one cell that is in the following stages of cell division: a. Prophase of mitosis? 12 chromosomes, 24 chromatids b. Metaphase I of meiosis? 12 chromosomes, 24 chromatids c. Metaphase II of meiosis? 6 chromosomes, 12 chromatids d. Anaphase II of meiosis? 12 chromosomes, 12 chromatids 2. For a diploid organism with 2 pairs of chromosomes, one of which is large and telocentric and the other of which is smaller and metacentric, diagram a cell at the following stages of cell division: 3. Anaphase I of meiosis. b. Metaphase ll of meiosis. 3. At what stage of meiosis does chromosome disjunction occur? At what stage of meiosis does chromatid disjunction occur? Chromosome disjunction occurs at anaphase I of meiosis. Chromatid disjunction occurs at anaphase ll of meiosis. ...
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