Biology for IGCSE & O level - Inheritance (Section 11 - No. 31)
If a man with normal color vision has a child with a woman who is a carrier for red-green color blindness, what is the probability that their son will be colorblind (assuming colorblindness is X-linked)?
0%
25%
50%
100%
Explication
The son has a 50% chance of receiving the recessive allele from his mother and being colorblind.