Adrianne is 5 years old and has an extra copy of chromosome 21.She has been diagnosed with the disorder known as
A) mental retardation.
B) Down syndrome.
C) autism spectrum disorder.
D) savant disorder.

Question

Quizplus · Accepted Answer

Down syndrome is a genetic disorder caused by the presence of an extra copy of chromosome 21. It typically results in intellectual disability, developmental delays, and distinctive physical features.

Adrianne Is 5 Years Old and Has an Extra Copy