MEHAU KULYK / SCIENCE PHOTO LIBRARY MEHAU KULYK / SCIENCE PHOTO LIBRARY
Chromosomes, computer artwork. Chromosomes, which consist of two identical chromatids joined at a centromere, are composed of deoxyribonucleic acid (DNA) coiled around proteins. DNA contains sections, called genes, that encode the body's genetic information, determining each cell's structure, function and behaviour.
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