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(New page: frame|Trisomy, the hallmark of Down syndrome, results when a baby is born with three copies of chromosome 21 instead of the usual two. ...) |
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[[Image:Trisomy_in_Down_syndrome.jpg|frame|Trisomy, the hallmark of Down syndrome, results when a baby is born with three copies of chromosome 21 instead of the usual two.]] | [[Image:Trisomy_in_Down_syndrome.jpg|frame|[[Trisomy]], the hallmark of Down syndrome, results when a baby is born with three copies of [[chromosome]] 21 instead of the usual two.]] | ||