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