Hemophilia,color Blindness,and Duchenne Muscular Dystrophy Occur More Often in Males

Multiple Choice

Hemophilia,color blindness,and Duchenne muscular dystrophy occur more often in males than females.Why?

A) These traits are carried only on the X chromosome.
B) Since there is no matching gene on the Y chromosome, the traits are expressed more readily in males.
C) Testis-determining factor (TDF) causes these diseases.
D) These diseases develop due to the lack of estrogen and progesterone.
E) These traits are carried only on the X chromosome and since there is no matching gene on the Y chromosome, the traits are expressed more readily in males.