If Jack and Jill have a child with an Aaa genotype, during which meiotic division, and in which parent, could nondisjunction have occurred?a. Meiosis 1 in motherb. Meiosis 2 in motherc. Meiosis 1 in fatherd. Meiosis 2 in father

Question

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20-01-2020
Biology

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If Jack and Jill have a child with an Aaa genotype, during which meiotic division, and in which parent, could nondisjunction have occurred?a. Meiosis 1 in motherb. Meiosis 2 in motherc. Meiosis 1 in fatherd. Meiosis 2 in father

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Answer:

The correct option are a) Meiosis 1 in mother c)Meiosis 1 in father d) Meiosis 2 in father

Explanation:

If a normal haploid sperm fertilizes an egg that has undergone non-disjunction in meiosis 1 than offsprings produced might be having Aaa genotype.

If a normal haploid sperm fertilized an egg that had undergone non-disjunction in meiosis 2 then the chances of the offsprings being formed would be AAa , aaa , Aa , aa , a. Hence, option B is not correct.