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Down syndrome or trisomy 21 is caused by nondisjunction of chromosome 21 in a parent who is chromosomally normal and is one of the most common chromosomal abnormalities in liveborn children.
Image Source: UNSW Embryology http://embryology.med.unsw.edu.au/Defect/page21.htm
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 16:18, 27 July 2009 | | 200 × 175 (5 KB) | MarkHill (talk | contribs) | Down syndrome or trisomy 21 is caused by nondisjunction of chromosome 21 in a parent who is chromosomally normal and is one of the most common chromosomal abnormalities in liveborn children. Image Source: UNSW Embryology http://embryology.med.unsw.edu.au |
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