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Physiology & Biochemistry · single question

What is the most common chromosomal abnormality?

  1. Trisomy 18 (Edwards syndrome)
  2. Trisomy 13 (Patau syndrome)
  3. Trisomy 21 (Down syndrome)
  4. Turner syndrome (45,X)
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Correct answer: C. Trisomy 21 (Down syndrome)

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