In humans, hemophilia is a sex-linked recessive trait. If a male who has hemophilia marries a female with
 normal blood clotting, what percent of the males will have the disease
 A- 0 males= 0% of the males
 B- 1 male= 50% of the males
 C- 2 males= 100% of the males
 D- 3 males= 100% of the males