What would be the expected result if a woman carrier for colour blindness and a colour blind man had many children?

A. All offspring will be colour blind.
B. All male offspring will be colour blind and all females normal.
C. All males will be normal and all females will be colour blind.
D. All females will be carriers of colour blindness or colour blind

D

This question had a very good discrimination index and did not prove to be too hard for candidates, who seem to perform well at this type of simple sex-linked cross.