Question

A recessive gene located on the X chromosome is the cause of color blindness in affected individuals. Males are more likely to be colorblind than females because

A) males have two copies of the X chromosome

B) color blindness is associated with high testosterone levels

C) females have no copies of the of the X chromosome

D) males have only one copy of the X chromosome

Answer 1

Answer;

D) males have only one copy of the X chromosome

Explanation;

• Men are much more likely to be colorblind than women because the genes responsible for the most common, inherited color blindness are on the X chromosome.
• Males only have one X chromosome, while females have two X chromosomes.