Your Friend Has Haemophilia and Was Worried That He Could

Multiple Choice

Your friend has haemophilia and was worried that he could pass it to his offspring when he had children. What would you tell him?

A) He is probably correct, he will pass haemophilia on.
B) Haemophilia is an X-linked disorder and it would be impossible for him to pass it to any male offspring. It would be possible for his female offspring to be carriers, though.
C) X-linked disorders are not inherited; he has no worries.
D) Since he has haemophilia, he is probably sterile and unable to father children.