Question

A daughter will not normally be colourblind, unless her mother is ...... and her father is ....

• A. Carrier, colour blind
• B. Colour blind, normal
• C. Colour blind, carrier
• D. Carrier, carrier

Answer 1

The correct option is A Carrier, colour blind

Daughters inherit x chromosomes of father & mother respectively since one x chromosome masks the effect of another x chromosome, a daughter will only be colourblind if her mother is a carrier & father is colorblind.

So, the correct option is 'Carrier, colour blind'.