Suppose that a woman with normal blood clotting mates with a man who also has normal blood clotting, and that their first child is a boy who has X-linked hemophilia. Which statement best predicts the outcomes of their mating?

Question

Quizplus · Accepted Answer

Since the mother is a carrier of the hemophilia gene, there is a 50% chance that any son they have will inherit the hemophilia gene from her and therefore have hemophilia. However, since the father does not have hemophilia himself, he cannot pass the gene onto his sons. Therefore, only half of their sons (the ones who inherit the gene from the mother) will have hemophilia. Their daughters, on the other hand, have a 50% chance of being carriers like their mother, and a 50% chance of having normal blood clotting like their father.

Suppose That a Woman with Normal Blood Clotting Mates with a Man