Red-green color blindness is more common in males than females because
A)the red pigment gene is on the X chromosome, the green is on an autosome.
B)the green pigment gene is on the X chromosome, the red is on an autosome.
C)the rhodopsin gene is on the X chromosome.
D)both the red and the green pigment genes are on the X chromosome.
E)both the red and the green pigment genes are on an autosome.

Question

Quizplus · Accepted Answer

Red-green color blindness is more common in males than females because both the red and the green pigment genes are located on the X chromosome. Males have only one X chromosome, so a single defective gene on it will result in color blindness. Females have two X chromosomes, so a defective gene on one of them can often be compensated for by a healthy gene on the other.

Red-Green Color Blindness Is More Common in Males Than Females