character: Causes of Down Syndrome
topic: Chromosomal Abnormalities
grade: 10
subject: Biology
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character: Trisomy 21
topic: Genetic Disorders
grade: 10
subject: Biology
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character: Non-disjunction
topic: Chromosomal Errors
grade: 10
subject: Biology
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character: Mosaic Down Syndrome
topic: Types of Down Syndrome
grade: 10
subject: Biology
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