KROK 1 2015 – Question 126 · KROK (Medicine) · Biology
A 2-year-old boy is diagnosed with Down syndrome. What chromosomal changes may be the cause of this disease?
- A. Trisomy 21
- B. Trisomy 13
- C. Trisomy 18
- D. Monosomy X
- E. Trisomy X
Hint
Recall which chromosomal abnormality most often underlies this well-known syndrome and how it usually arises in meiosis.
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