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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.