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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