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It could be cut for many reasons. When undergoing meiosis, DNA is cut to create novel gene arrangements on chromosomes. DNA can also be damaged by mutagens like UV light, and will be cut by certain enzymes to help in the repair on the DNA. In the lab, biologist cut DNA to insert genes, knock out genes, or to ensure that the gene is there. These are just a few reasons, but it is useful to cut DNA both in the lab and in the organism.

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13y ago

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