Color-blindness is an example of a _____.

Color-blindness is much more common in males than females. This is because the color-blindness allele (gene variant) is a recessive allele carried on the X-chromosomes. Since a female carries two X-chromosomes she would need to inherit two copies of the color-blindness allele to express it. Males have a single X-chromosomes, so they need to get only one copy of this allele to express it.

Asked by Eugene Fenster · Last updated 5 years ago · 7.4K views