Chromosomal disorder in which chromosome 21 is affected.
Comprehensive, easy-to-understand information about this condition
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Down syndrome
MONDO:0008608
ring chromosome 21
MONDO:0015437
monosomy 21
MONDO:0018930
tetrasomy 21
MONDO:0019864
maternal uniparental disomy of chromosome 21
MONDO:0019918
paternal uniparental disomy of chromosome 21
MONDO:0019925