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USMLE · Question #611
USMLE Question #611: Real Exam Question with Answer & Explanation
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Question
A 2-year-old male is brought to the physician due to mental retardation. Physical examination reveals a single palmar crease, flat face and prominent epicanthal folds. The most likely cause of these findings is:
Options
- Aheteroplasmy
- Bincomplete penetrance
- Cmeiotic nondisjunction
- Dmosaicism
- ERobertsonian translocation
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