Principle Of Inheritance And Variation Question 75

Question: A husband and wife have normal vision but fathers of both of them were colour blind. Probability of their first daughter to be colour blind is [CBSE PMT 1990]

Options:

A) 25%

B) 50%

C) 75%

D) 0%

Show Answer

Answer:

Correct Answer: D

Solution:

Probability of their first (or any) daughter being colourblind is nil as the daughter of normal father can never be colourblind.