The gene for red-green color vision is on the x-chromosome. Color blindness is caused by a recessive allele. A normal woman (X^N X^N) marries a color-blind man (X^n Y). What fraction of their children will be color-blind?

a. 0/4
b. 1/4
c. 2/4
d. 3/4


Answer: a. 0/4

Biology & Microbiology

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