question_answer

Both husband and wife have normal vision though their fathers were colour-blind. The probability of their daughter becoming colour-blind is

A)  0%                

B)  25%

C)  50%                           

D)  75%

Correct Answer: A

Solution :

The probability of the daughter becoming colour-blind arises only when the father is also colour-blind. So, probability of their daughter becoming colour- blind is 0 %. Hence, the correct option is [a].