Gamete mother cells of the chromosome 44 + XY suffers from non-disjunction at first meiotic division. Which of the following set of gametes would result?

Gamete mother cells of the chromosome 44 + XY suffers from non-disjunction at first meiotic division. Which of the following set of gametes would result?

a)

22 + XX, 22 + XY, and 22, 22

b)

22 + XY, 22 + XY, and 22, 22

c)

22 + X, 22 + Y, and 22 + Y, 22

d)

22 + X, 22 + XY, and 22 + Y, 22 + Y

1 Answer

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Answer Key / Explanation : (b) -

(b)

Non-disjunction is the condition in which the separation of chromosome doesn’t take place during cell division. In 44+XY non-disjunction there is non-separation of XY gene is there, which leads to the formation of sperm having genotypes, 22+XY and 22