X and Y chromosomes. Computer artwork of an X (left) and a Y (right) chromosome. Chromosomes are made of very condensed deoxyribonucleic acid (DNA). DNA contains sections,called genes,which encode the body's genetic information. An individual's sex is determined by the presence or absence of the Y chromosome. Women have two X chromosomes,while men have an X and a Y. The Y chromosome is much smaller than the X. This is because it only contains genes for 'maleness',for example,a gene that triggers the development of the testes | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Pasieka, Alfred |
Taille de l’image : | 5000 px × 3600 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |