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Question

Which of the following gametes can only come from a male parent in humans?

A
22 + X
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B
22 + Y
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C
22 + XY
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D
22 + XX
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Solution

The correct option is B 22 + Y
The genotype of gametes produced by males are 22+X and 22+Y whereas females produce gametes of only 22+X genotype. This is because the Y chromosome is contained only in males. Hence the 22+Y gamete can come from a male only.

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