A woman is heterozygous for X-linked color blindness. Considering the implications of X-inactivation, her phenotype is:

Question

Quizplus · Accepted Answer

X-inactivation means that only one of the two X chromosomes in a female is active in each cell. This means that the heterozygous woman would have some cells expressing the normal color vision allele and some cells expressing the color blindness allele. However, since the normal allele is dominant, the overall phenotype would be normal color vision.

A Woman Is Heterozygous for X-Linked Color Blindness