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?
a. All of the children will have hemophilia.
b. None of the children should have hemophilia.
c. All of the boys and half of the girls will have hemophilia.
d. Half of the boys and none of the girls will have hemophilia.
Answer: d. Half of the boys and none of the girls will have hemophilia.
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