question_answer

Proportion of colour blind children when normal man marries to carrier woman is

A)  25%                      

B)  50%   

C)  75%                      

D)  100%

Correct Answer: A

Solution :

                Colour blindness is an X-linked recessive disorder. If a carrier woman mates with the normal man, 25% of the offsprings will suffer from the disorder. 50% will be normal and 25% will be carrier for the disease.