A women whose brother has haemophilic is concerned about passing this trait to her offspring. What is the risk that she will have a son with haemophilia?

Q. A women whose brother has haemophilic is concerned about passing this trait to her offspring. What is the risk that she will have a son with haemophilia?

A.            1/8

B.            1/4

C.            1/2

D.            1

Answer: ¼