Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Down syndrome human karyotype 47,XY,+21. Wessex Reg. Genetics Centre. Source: Wellcome Collection.
![no text alternative](https://iiif.wellcomecollection.org/image/B0000249/full/800%2C/0/default.jpg)
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Down syndrome human karyotype 47,XY,+21. Wessex Reg. Genetics Centre. Source: Wellcome Collection.