A Color-Blind Man and a Woman with Normal Vision Whose

Multiple Choice

A color-blind man and a woman with normal vision whose father was color blind have a son.Color blindness, in this case, is caused by an X-linked recessive gene.If only the male offspring are considered, the probability that their son is color blind is

A) 0.25 (or 25%) .
B) 0.50 (or 50%) .
C) 0.75 (or 75%) .
D) 1.00 (or 100%) .
E) none of these.