Question

Red green color blindness is inherited as a sex linked recessive trait. The gene is found on the C chromosome. How can a father, with red-green blindness have a son who is NOT red green color blind?
a) the father is heterozygous for red green color blindness
b) the son's mother does not carry an allele for red green color blindness.
c) the son's mother is red green color blind.
d) he can't (unless there is a mutation
e) the red green color blindness trait must be dominate.

Answer 1

Explanation:

Colour blindness is a common hereditary (inherited) condition which means it is usually passed down from your parents. Red/green colour blindness is passed from mother to son on the 23rd chromosome, which is known as the sex chromosome because it also determines sex.