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Question

A woman with 47 chromosomes due to three copies of chromosome 21 suffers from
  1. Down ‘s syndrome
  2. super femaleness
  3. triploidy
  4. Turner’s syndrome


Solution

The correct option is A Down ‘s syndrome

Down syndrome also known as trisomy 21, is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21. It leads to individuals having short stature, furrowed tongue and partially open moutrh. They also have a characteristic palm crease. Physical and mental development is retarded.

Super females are seen as a result of Klinefelter's syndrome in which the individual has an additional copy of the X chromosome (XXY).

Turner's syndrome is a disorder caused due to the absence of an X chromosome (XO).

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