Illustration of a Y chromosome. Each chromosome consists of two identical strands (chromatids),aligned parallel to each other and joined at an area called a centromere. 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. Chromosomes consist of very condensed deoxyribonucleic acid (DNA). DNA contains sections,called genes,which encode the body's genetic information. The Y chromosome only contains genes for 'maleness',for example a gene that triggers the development of the testes,and is much smaller than the X chromosome | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Shockey, Gwen |
Taille de l’image : | 1806 px × 2754 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
|