Red-green colorblindness in humans is a sex-linked trait. If a woman with normal vision, whose father was colorblind, marries a man whose mother was colorblind, what is the probability of their first child being a colorblind girl?
(A) 0 percent
(B) 12.5 percent
(C) 25 percent
(D) 50 percent
(E) 100 percent
Answer (2)
d 50 percent. use the punnent square to figure that out
The probability of the couple having a colorblind daughter is 25%. This is due to the woman being a carrier (Cc) and the man having the X chromosome with the colorblind allele (Xc). Therefore, the answer is C) 25 percent.
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