Question

A girl of normal vision marries a boy of normal vision. Father of both the boy and girl are colour blind. What will be the percentage of having normal, carrier and affected offsprings?​

Answer 1

Explanation:

Colour blindness is a X-linked recessive disorder. Father transmit its X chromosome to the daughters so the colour blind father will inherit its affected X chromosome to the daughter. Hence, the genotype of carrier female will be (XcX) and that of normal man will be (XY). The carrier female and normal man will transmit the disease to 50% sons.