Question

A normal woman, whose father was colour blind is married to a normal man. Her sons would be

• A. All normal
• B. All colour blind
• C. 75% colour blind
• D. 50% colour blind

Answer 1

The correct option is D 50% colour blind

Genotype of mother - XC Xc
Genotype of father - XC Y
Offsprings: XC XC (Normal), XC Y (Normal), Xc XC (Normal), Xc Y (Colour blind).