DNA researcher holding an autoradiogram. This autoradiogram is a control, and does not show a DNA (deoxyribonucleic acid) sequence. Autoradiograms are used to determine the sequence of base pairs on a segment of DNA. DNA controls the growth and development of all living things. Each individual has a unique DNA sequence. DNA is divided into discrete lengths called genes, each gene having a specific purpose. The function of a gene is determined by the sequence of the bases that comprise it. Study of DNA sequences provide information on growth, development and disease. Sequencing is also used in genealogy and forensic science.
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