CPMT - 2002 (Zoology)

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Multiple Choice

Down syndrome is caused due to which of the following?

  1. Increase in number of chromosomes in 21st pair autosome
  2. Decrease in number of chromosomes in 21st pair autosome
  3. Increase in number of chromosomes in 18th pair autosome
  4. Decrease in number of chromosomes in 18th pair autosome
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