Red-green colorblindness is a sex-linked recessive trait located on the X chromosome. A colorblind woman has two X chromosomes with the colorblind allele (X^cX^c), while a man with normal color vision has one normal X chromosome (X^Y). Their daughter will inherit one X chromosome from each parent, resulting in X^c from the mother and X from the father (X^cX). Thus, their daughter will be a carrier of the colorblind trait but will not be colorblind herself, as she has one normal allele.
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