Question

A man whose father was colour blind marries a woman who had a colour blind mother and normal father. What percentage of male children of this couple will be colour blind? (1) 50% (2) 75% (3) 25% (4) 0%

Answer 1

25% as the father and mother both are colourblind by 50 % so we must do 50 % of 50% which is 25% hope this helps