In which maternal age range is Trisomy 21 most frequently observed?

Biology Mcqs for PPSC, FPSC, NTS, and Pakistan government job tests. Select an option below, then read the explanation.

PPSCFPSCNTSPakistan govt jobs
Subject
Biology Mcqsbiology-mcqs
Published
4 Jan 2020
Last updated
28 May 2026

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Explanation

The incidence of Trisomy 21, or Down syndrome, increases significantly with maternal age, particularly in women aged 40 to 45 years, making this age group the most common for this chromosomal condition.

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