Question

A boy is colour blind, in his two sisters one is colour blind and one is a carrier (normal). Who is colour blind in his parents?

• A. Father
• B. His grandfather and mother
• C. Mother
• D. His grandfather

Answer 1

The correct option is A Father

When a colourblind man marries a carrier woman then half of his sons will be colourblind and rest half normal and half of his daughters will be colourblind and rest half carriers.

So, the correct option is A.