Down syndrome is a human genetic disease caused by an extra chromosome 21, characterized by mental retardation and heart/respiratory defects.
Le syndrome de Down est une maladie génétique humaine causée par la présence d'un chromosome 21 supplémentaire, caractérisée par un retard mental et des défauts cardiaques et respiratoires.
| Front | Down syndrome |
|---|---|
| Back | A human genetic disease caused by the presence of an extra chromosome 21; characterized by mental retardation and heart and respiratory defects. |
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