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 f

Sign in or unlock USMLE to reveal the answer and full explanation for question #611. The question stem and answer options stay visible for context.

Abnormal Processes

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

Unlock USMLE to see the answer

You've previewed enough free USMLE questions. Unlock USMLE for full answers, explanations, the timed quiz mode, progress tracking, and the master PDF. Question stem and options stay visible so you can still see what's on the exam.

Unlock USMLE - $49.99 / 30 days Sign in

Topics

#Down syndrome#trisomy 21#meiotic nondisjunction#chromosomal disorders

Full USMLE Practice