Individuals with Down syndrome show which of the following characteristics?
A) intellectual disability
B) aggression
C) an extra X chromosome
D) a lack of sexual development

Question

Quizplus · Accepted Answer

Individuals with Down syndrome typically have an intellectual disability, which can range from mild to severe.

Answer: C 
 Down syndrome is caused by an extra copy of chromosome 21, not an extra X chromosome.

Answer: None of the above 
 Aggression and lack of sexual development are not characteristic features of Down syndrome, although individuals with Down syndrome may experience other characteristic physical and developmental features such as low muscle tone, small stature, and a flat facial profile.

Individuals with Down Syndrome Show Which of the Following Characteristics