A man who is colorblind marries and has children by a woman who has normal color vision. The woman's father had normal color vision but her mother was colorblind. Color blindness is an X-linked recessive disorder. What are the chances that this man and woman will give birth to a colorblind girl (restated: of all the possible children, how many would be female and color blind)?
a. None
b. 25%
c. 50%
d. 75%
e. 100%
Ans: b. 25%
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