NEET Biology question

If a colour-blind man marries a woman who is homozygous for normal colour vision, the probability of their son being colour-blind is

(A)0Correct
(B)0.5
(C)0.75
(D)1

Answer: (A)

Solution

The colour-blind man's genotype is ; the woman, being homozygous for normal vision, is . Sons receive a Y chromosome from the father and an X chromosome from the mother — since the mother's X chromosomes are both

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Question ID VK-120226