Why are men more likely to experience color vision deficiency than women?

Question

Quizplus · Accepted Answer

Color vision deficiency is caused by mutations on the genes that create photopigments in the cones of the retina. These genes are located on the X chromosome, and men only have one X chromosome while women have two. This means that men are more likely to inherit a gene mutation for color vision deficiency from their mother, while women would need two copies of the gene mutation (one from each parent) to be affected. Therefore, color vision deficiency is a sex-linked genetic disorder.

Why Are Men More Likely to Experience Color Vision Deficiency