MGIMS WARDHA MGIMS WARDHA Solved Paper-2010

  • question_answer
    Down's syndrome is caused by an extra copy of chromosome number 21. What percentage of a normal father would be affected by this disorder?

    A)  50%                                      

    B)  25%

    C)  100%                                   

    D)  75%

    Correct Answer: A

    Solution :

                     Down's syndrome is the result of trisomy in which chromosome number 21st contains an extra copy of chromosome (2A + 1). Affected mother will produce 50% normal egg cells and rest 50% eggs are of abnormal type.


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