Question

red - green color blindness is an inability to distinguish red colors from green colors.
in which sex is color - blindness more prevalent and why?
○ color blindness is more prevalent in females because females lack red photoreceptors.
○ color blindness is more prevalent in females because it is an x - linked trait.
○ color blindness is more prevalent in males because males lack red photoreceptors.
○ color blindness is more prevalent in males because it is an x - linked trait.

Explanation:

Red - green color blindness is an X - linked recessive trait. Males have one X and one Y chromosome (\(XY\)). If the X chromosome has the recessive color - blindness allele, they will express the trait. Females have two X chromosomes (\(XX\)). They need two copies of the recessive allele (one from each parent) to be color - blind. Since it is less likely for females to get two recessive alleles compared to males getting one, color blindness is more prevalent in males. Also, it's not about lacking red photoreceptors in a sex - specific way (both sexes have red photoreceptors in normal cases).

Answer:

Color blindness is more prevalent in males because it is an X - linked trait.