Which Statement About Down Syndrome Is Correct

Multiple Choice

Which statement about Down syndrome is correct?

A) Down syndrome is caused by a third copy of chromosome 21.
B) Down syndrome is usually associated with chromosomal nondisjunction in meiosis.
C) Characteristics of Down syndrome include stubby fingers and a palm crease.
D) Individuals affected with Down syndrome display mental impairment.
E) All of the answer choices are correct about Down syndrome.