NEET Biology question

A woman has a haemophilic son and three normal children. Her genotype and that of her husband with respect to this gene would be

(A) and
(B) and
(C) and
(D) and Correct

Answer: (D)

Solution

Since the woman has one haemophilic son, she must carry the recessive allele on one of her X-chromosomes, but since she herself is not described as haemophilic and has other normal children, she must be heterozygous (a

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Question ID VK-119607