Question

multiple choice question
______ is a cause of intellectual disability resulting from the presence of an extra chromosome.
○ familial intellectual disability
○ mild intellectual disability
○ fetal alcohol syndrome
○ down syndrome

Explanation:

Down syndrome is a genetic disorder caused by the presence of an extra chromosome (usually an extra copy of chromosome 21). Familial intellectual disability is often related to family genetics but not specifically an extra chromosome. Mild intellectual disability is a level of disability, not a cause. Fetal alcohol syndrome is caused by prenatal alcohol exposure, not an extra chromosome.

Answer:

Down syndrome