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. 25 percent.
b. 50 percent.
c. 75 percent.
d. 100 percent.
e. 0 percent.
B
Biology & Microbiology
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