RAJASTHAN PMT Rajasthan - PMT Solved Paper-2006

  • question_answer
    Down syndrome is due to :

    A)  chromosome number increase in 21st pair autosome

    B)  chromosome number decrease in 21st pair autosome

    C)  chromosome number increase in 18th pair autosome

    D)  chromosome number decrease in 18th air autosome

    Correct Answer: A

    Solution :

    Downs syndrome (or mongolism) is a congenital disorder of people which is caused by the trisomy of chromosome 21.


You need to login to perform this action.
You will be redirected in 3 sec spinner