Question
Biology Question on Principles of Inheritance and Variation
Which of the following is an example of sex-linked inheritance?
A
Night-blindness
B
Anaemia
C
Colour-blindness
D
Cretinism
Answer
Colour-blindness
Explanation
Solution
Colour - blindness is a sex linked disease which is linked to X - chromosome. Cretinism is arrested physical and mental development with dystrophy of bones and soft tissues, due to congenital lack of thyroid secretion. Night - blindness is caused by deficiency of vitamin A. Anaemia is caused due to iron deficiency.