What are all the chances of colour blind daughters and sons being born in a marriage of normal man marrying a normal woman whose father was colour blind ?

Options

A. All sons are normal and all daughters are colour blind
B. Both the sons and daughter phenotypically normal
C. All the sons are colour blind and all daughters are normal
D. 50 % sons are colour blind and all daughters are phenotypically normal

Answer

D

Explanation

50 % sons are colour blind and all daughters are phenotypically normal