Colorblindness is ____.
A) more prevalent in females than males
B) more prevalent in males than females
C) present in both sexes equally
D) encoded by genes on the Y chromosome
E) not a genetic condition

Question

Quizplus · Accepted Answer

Colorblindness is more prevalent in males than females because the genes responsible for the most common forms of color vision deficiency are located on the X chromosome. Males have only one X chromosome, so a single recessive gene on that X chromosome will result in colorblindness. Females have two X chromosomes, so a mutation would have to occur in both copies of the gene to cause the condition, making it less common in females.

Colorblindness Is ____