Down syndrome is caused by chromosomal abnormality: NEET Biology MCQ

Last updated: July 30, 2026

Reviewed by MedQGo Editorial Team | Last updated: July 30, 2026

Down syndrome is caused by

Aa single gene mutation

Bmultiple genes interaction

Cchromosomal abnormality

Dmitochondrial disorder

Correct answer: C. chromosomal abnormality

Down syndrome, also known as trisomy 21, is a genetic condition caused by the presence of all or part of a third copy of chromosome 21. This makes it a chromosomal abnormality.

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