138 Genetic engineering involves manipulating DNA for practical purposes U4MIMH141 Mastering Biology ° Guided Video Tour forModule6.13 The history of science demonstrates that after researchers understand a natural phenomenon, they often use this knowledge to manipulate the natural world. So it is with our understanding of DNA. Gaining knowledge of the structure and function of DNA led to the development of several important technologies that are used to manipulate DNA for practical purposes. Here, you can see some of the basic methods for working with DNA in the laboratory and some of the products that result. DNA CAN BE MIXED AND MATCHED Because the hereditary information of all life is written in the identical chemical language of DNA, a gene from one species may be cut and pasted into the DNA of a different species. Genetic engineers have produced many such organisms. For example, biologists have made mice (as well as fish, cats, and monkeys) that contain a glow gene from a jelly (jellyfish), and many of our food crops are genetically modified to contain beneficial genes from other organisms.
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