Which chromosomal abnormality results in mild to severe mental retardation and other abnormalities?

Question

Quizplus · Accepted Answer

Down syndrome is caused by the presence of an extra copy of chromosome 21, which leads to mild to severe mental retardation and other abnormalities such as characteristic facial features and heart defects. The other options listed do not involve chromosomal abnormalities, and therefore do not result in Down syndrome or similar developmental conditions.

Which Chromosomal Abnormality Results in Mild to Severe Mental Retardation