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Home Q & A Board Biology-Related Homework Help Genetics and Developmental Biology
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veze12345 veze12345
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9 years ago
Part B - Nondisjunction
Suppose a diploid cell with three pairs of homologous chromosomes (2n = 6) enters meiosis.

How many chromosomes will the resulting gametes have in each of the following cases?
Drag one label into each space at the right of the table. Labels can be used once, more than once, or not at all.
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#1
Educator
9 years ago
1. Regular meiosis is 2n Rightwards Arrow n, so each daughter cells has 3 chromsomes

2. After Meiosis I, 1 daughter cell will have 4 chromosomes, and the other 2. If disjunction occurs normally in Meiosis II, end result is 2 daughter cells with 4 chromsomes, and 2 daughter cells with 2 chromosomes. (4,4,2,2)

3. After Meiosis I, 1 daughter cell has 6 chromosomes, and the other 0. After Meiosis II, 2 daughter cells with 6, and 2 daugther cells with 0. (6,6,0,0).

4. After Meiosis I, both daughter cells has 3 chromsomes. After Meiosis II, 2 daughter cells will have 3 chromosomes, and 1 daugter cell will have 4, and 1 daughter cell will have 2. (3,3,4,2)

5. After Meiosis I, both daughter cells has 3 chromosomes. Non-disjuction occurs in both daughter cells in Meiosis II, so it would be 3,0,3,0
lalaland12
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doubleudoubleu
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9 years ago
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#3
9 years ago
thank you!
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#4
8 years ago
You are right except for part 5 of the question is 0,3, or 6.
lalaland12,  suibin
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