Question

color blindness is the inability ro distinguish between certain colors.Red-green color blindness is caused by an X-linked recessive allele,X^cb.In order for a female ro be color blind,what genitype would she have to be?what about a colorblind male?what about a colorblind male?Remember,females have the genotype XX and males are XY.​

Answer 1

For a female to be colour blind-X^cb X^cb (in both alleles) and for a male-X^cbY

Explanation: Since females have 2 x-chromosomes they have to recessive to manifest colour blindness and males have only 1 x-chromosome ,so colour blindness in males is decided by only 1 allele.

Therefore there can be a carrier state in females(have recessive trait on 1 chromosome but cannot manifest it due to a dominant one on other) but not in males(either they have it or not).