x-linked traits

Friday March 22nd

Hemophilia is an inheritable genetic disorder that prohibits the proper formation of blood clots.  The recessive gene that causes hemophilia is located on the X-chromosome.  Given this information, which of the following statements is true?

A.  In order for the male offspring to be a hemophiliac, his father must be a hemophiliac

B.  In order for a female offspring to be a hemophiliac, her father must be a hemophiliac.

C.  In order for a male offspring to be a hemophiliac, his mother must be a hemophiliac

D.  In order for a female offspring to be a hemophiliac, her mother must be a hemophiliac.