Genetic engineering is the process of manipulating and collecting a known quantity of genes from a known source, opening the recipient DNA at the desired point in the linkage. Then combining the strand of a known sequence of DNA with the recipient DNA of living organisms. The protein factories then synthesize the anticipated product, which can be used for any number of purposes. For example, human genes can be transferred to bacteria and bacterial genes to plants. The genes selected for transfer usually code for a single, useful protein like insulin. Some code for a useful set of enzymes like the ones needed for nitrogen fixation in cyanobacteria.
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