Regarding Down syndrome, which of the following statements is TRUE?
A)Down syndrome is a sex-linked hereditary condition.
B)Down syndrome results from an inherited inability to control a destructive chemical that builds up in their bodies.
C)Down syndrome is a condition caused by an extra chromosome at pair 21.
D)Down syndrome is caused by the mother's heavy drinking during pregnancy.

Question

Quizplus · Accepted Answer

Down syndrome is caused by the presence of an extra chromosome 21, making it a trisomy 21 condition. This is not inherited in the traditional sense, nor is it related to lifestyle choices or chemical imbalances.

Regarding Down Syndrome, Which of the Following Statements Is TRUE