NEET Biology question

If a haemophilic man marries a carrier woman, then which of the following holds true for their progeny?

(A)50% daughters are carrier and 50% are haemophilicCorrect
(B)All the daughters are haemophilic
(C)All sons are haemophilic and all daughters are normal
(D)All sons normal, all daughters carriers

Answer: (A)

Solution

Crossing a haemophilic man () with a carrier woman (): daughters receive the father's and either the mother's (50%, giving , haemophilic) or her normal (50%, giving , carrier) — so

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Question ID VK-120364