Question

Red-green color blindness (Xb) is a recessive sex-linked trait. A colorblind male marries a normal color vision female.



Their daughter is colorblind.



What are the genotypes of both parents and the daughter for this trait, in words.

a
The mother is heterozygous, father is colorblind, daughter is homozygous.
b
The mother is heterozygous, father is colorblind, daughter is heterozygous.
c
Impossible to determine with the given information.
d
The mother is homozygous, father is homozygous, daughter is heterozygous.

Answer 1

b. The mother is heterozygous, father is colorblind, daughter is heterozygous.