AP Success - AP Biology Conceptual Analysis: Evolution - Genetics

Color blindness is a sex-linked trait in humans. It is caused by a recessive allele on the X chromosome.

Describe the inheritance pattern of color blindness in humans.

A color-blind woman and a man with normal vision have a child. Explain the possible phenotypes of their offspring.

Predict the phenotype of the offspring if a color-blind man and a woman who is a carrier for color blindness have a child.

Scientists claim that sex-linked traits like color blindness are more common in males than in females. Justify this claim using your understanding of genetics and evolution.