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How can gene editing be used in medical research?A) It can change a few bases in a piece of mutated DNA.B) It can make several exact copies of mutated genes.C) It can insert genes from one species into another.D) It can map the locations of whole genes on chromosomes.‚Äč

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Once the DNA is cut, researchers use the cell's own DNA repair machinery to add or delete pieces of genetic material, or to make changes to the DNA by replacing an existing segment with a customized DNA sequence. Genome editing is of great interest in the prevention and treatment of human diseases.

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