Because the gene for hemophilia is located on the X-chromosome, it is normally impossible for a:
A. carrier mother to pass the gene to her son.
B. carrier mother to pass the gene to her daughter.
C. hemophiliac father to pass the gene on to his son.
D. hemophiliac father to pass the gene to his daughter.
Only females give an X-chromosome to their sons, the males give the Y-chromosome. Therefore, it doesn't matter if the father is a hemophiliac or not in terms of his son, he can't give his defective gene to his son.