A 2-month old infant is brought to the physician's office to be examined, and the physician notices that he has flaccid muscles, a smaller head than usual, a large tongue, and a short nose and broad face. The parents say that the baby is very quiet and hardly ever cries. The pediatrician suspects aneuploidy. The baby probably has which of the following chromosomal configurations?

Question

Quizplus · Accepted Answer

The flaccid muscles, smaller head, large tongue, short nose, broad face, and quiet demeanor are all symptoms of Down syndrome, which is caused by trisomy of chromosome 21.

A 2-Month Old Infant Is Brought to the Physician's Office