Question

A haemophiliac man marries a carrier woman. Their children will be ____________.

• A. All children haemophiliac
• B. One fourth children haemophiliac
• C. Half children haemophiliac
• D. One tenth children haemophiliac

Answer 1

The correct option is C Half children haemophiliac

Xh represents Haemophilic affected gene. A haemophilic man will have (XhY) chromosomes whereas a carrier woman will have XhX chromosomes. Hence the offsprings can have the following chromosomes combinations:

For male offsprings: XhY, XY.

For female offsprings: XhXh, XhX, XX, XXh.

Hence, half children will be haemophilic.

So, the correct answer is 'Half children haemophiliac'.