Last Updated
：2025/11/25
trisomy 21
Quizzes for review
The presence of three copies of the 21st chromosome in the karyotype.
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trisomy 21
The pediatrician explained that trisomy 21 often causes characteristic facial features and developmental delays, and recommended early intervention services.
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The pediatrician explained that trisomy 21 often causes characteristic facial features and developmental delays, and recommended early intervention services.
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