Why is color blindness more common in males than in females?
A) It is coded by a damaged allele.
B) It is coded by a dominant allele.
C) It is carried by a gene on the Y chromosome.
D) It is carried by gene on the X chromosome.

Question

Quizplus · Accepted Answer

Color blindness is carried on the X chromosome, so males with a damaged allele on their only X chromosome will exhibit the trait. Meanwhile, females have two X chromosomes, so if they have a damaged allele on one, their other healthy X chromosome can compensate. As a result, females are less likely to be affected by color blindness.

Why Is Color Blindness More Common in Males Than in Females