Question

Given is a highly simplified representation of the human sex chromosomes from a karyotype. The genes a and b could be of.

• A. Colour blindness and body height
• B. Attached earlobe and Rhesus blood group
• C. Haemophilia and red green colour blindness
• D. Phenylketonuria and haemophilia

Answer 1

The correct option is C Haemophilia and red green colour blindness

Haemophilia and red-green color blindness both are sex-linked recessive gene on an X chromosome. Body height is an example of polygenic inheritance. Rhesus blood group is base on the presence or absence of Rh-protein on the surface of RBC, phenylketonuria (PKU) is a recessive autosomal variation.

So, the correct answer is 'Haemophilia and red green colour blindness'.