Question

If a haemophilic man marries a woman carrier (heterozygous) for haemophilia, what would be the possibility that their daughter would be haemophilic?

• A. 100%
• B. 75%
• C. 50%
• D. 0%

Answer 1

The correct option is C 50%

Haemophilic man will have genotype- $X^h$ Y

Woman carrier - X$X^h$
Daughter progeny:$X^h$X (Carrier female),$X^h$$X^h$ (Haemophilic female)
50% chance for daughters to be haemophilic.

So, the correct answer is option C.