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

Answer 1

The genotypes of the parents and daughter for this trait are as follows:

- The father is colorblind, so his genotype is XbY.
- The mother is normal color vision, so her genotype is XNXN or XX.
- The daughter is colorblind, so her genotype is XbXb.