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back mutation

genetics
Also known as: reversion

Quick Summary

A back mutation, also known as reversion, is a genetic change where a mutated gene returns to its original, or "wild type," condition. This process is the opposite of a forward mutation, which changes a gene from its wild type to a mutant form.12

While true reversion involves reversing the exact nucleotide change, a phenotypic reversion can occur through different mechanisms. These include a different nucleotide change that restores an amino acid with similar properties, or a second-site mutation in the same or a different gene that compensates for the original mutation's effect. These compensatory mutations can restore normal protein function or create alternative biochemical pathways.3

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