AIIMS AIIMS Solved Paper-2006

  • question_answer
    Given below is a highly simplified representation of the human sex chromosomes from a karyotype. The genes a & b could be of:

    A)                 colour blindness and body height

    B)                 attached ear lobe and rhesus blood group

    C)                 haemophilia and red-green colour blindness

    D)                 phenylketonuria and haemophilia

    Correct Answer: C

    Solution :

    Haemophilia and red green colour blindness both are sex linked recessive gene on 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.


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