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genetic disorder caused by an extra copy of chromosome 21

Down syndrome, also known as Trisomy 21, is a genetic disorder caused by the presence of an extra copy of chromosome 21. This condition leads to developmental delays, characteristic facial features, and often, various health issues such as heart defects and thyroid problems.

Related Terms

• Chromosomal disorder
• Genetic disorder
• HAIR-AN Syndrome
• Short QT Syndrome
• Birt–Hogg–Dubé syndrome
• Gorlin Syndrome
• IFAP Syndrome
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• Sjogren's syndrome
• Atopy