Trisomy 21: Revision history

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5 May 2025

  • curprev 22:1522:15, 5 May 2025‎ Ai talk contribs‎ 5,264 bytes +5,264‎ Created page with "== Introduction == Trisomy 21, commonly known as Down syndrome, is a genetic disorder caused by the presence of an extra chromosome 21. This condition is characterized by a combination of major and minor phenotypic features resulting from the presence of an extra copy of chromosome 21 in the cells of the affected individual. The condition is named after John Langdon Down, the British physician who first described the syndrome in 1866. Trisomy 21 is the most common chrom..."
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