Karyotype of a woman with Down's Syndrome (trisomy 21), showing an additional twenty-first chromosome. A normal set of chromosomes contains only two of each chromosome. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Schroeder, Monica |
Taille de l’image : | 3419 px × 2656 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |