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What is the percentage of children being a carrier of haemophilia if their mother is a carrier and their father is a normal man?

What is the percentage of children being a carrier of haemophilia if their mother is a carrier and their father is a normal man? Correct Answer 25%

The percentage of children being a carrier of haemophilia if their mother is a carrier and their father is a normal man is 25% because the gametes formed by mother are X and Xh while the gametes formed by father are X and Y. The genotype of the offspring obtained would be XY, XX, XXh and XhY. Thus 50% of children are normal, 25% are carriers of haemophilia and 25% are haemophilic (only son).

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