What do the conditions hemophilia, duchenne muscular dystophy, and red-green color blindness have in common?

Question

what do the conditions hemophilia, duchenne muscular dystrophy, and red-green color blindness have in common?

a)they are x-linked

b)they are more common in females than in males

c)they are caused by inheritance of an extra s*x chromosome

d)they are caused by inheritance of an extra autosome

e)the gene that causes them is on the Y chromosome

Answer 1

a) They are X- linked.