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Definition of DNA repair

DNA repair: The body has a series of special enzymes to repair mutations (changes) in the DNA and restore the DNA to its original state.

The DNA in genes is constantly mutating and being repaired. This repair process is controlled by special genes. A mutation in a DNA repair gene can cripple the repair process and cause a cascade of unrepaired mutations in the genome that lead to cancer.


Last Editorial Review: 11/4/1999

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