Moderate

Having 47 chromosomes in each cell instead of 46 is a characteristic of:

Correct answer: A. Down syndrome

  • A. Down syndrome
  • B. cretinism
  • C. hydrocephaly
  • D. microcephaly

Explanation

Down syndrome is usually caused by trisomy 21, giving the person 47 chromosomes in each cell rather than the usual 46. Cretinism and microcephaly describe different developmental conditions.

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