Principle Of Inheritance And Variation Question 49

Question: A boy is colour blind, in his two sisters one is colour blind and one is carrier (normal). Then who is colour blind in his family [CPMT 1994]

Options:

A) Father

B) His grandfather and mother

C) Mother

D) His grand father

Show Answer

Answer:

Correct Answer: A

Solution:

When a colourblind man marries a carrier woman then half of his sons will be colourblind and rest half normal and half of his daughters will be colourblind and rest half carriers.