Suppose you are a genetic counsellor, and a man and woman come to you with concerns that if they have a child together, it could have hemophilia. Also suppose that the man has an X-linked recessive form of hemophilia, but the woman does NOT, and that genetic tests reveal the woman is NOT a carrier for hemophilia. Which of the following is the best advice you could give them?
a. Each child that they produce will have a 50% chance of having hemophilia.
b. None of their offspring should have hemophilia, but each of their female offspring will be carriers for hemophilia.
c. Each of their male offspring will have a 50% chance of having hemophilia; and while their female offspring should not have hemophilia, they will each have a 50% chance of being carriers.
d. Each of their male offspring will have hemophilia, and each of their female offspring will have a 50% chance of
Ans: b. None of their offspring should have hemophilia, but each of their female offspring will be carriers for hemophilia.
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