noun[mass noun] Biology
The occurrence of a mutation in the somatic tissue of an organism, resulting in a genetically mosaic individual.
- One means by which these mutations occur is via somatic mutation or chromosomal deletion of one or both alleles.
- In the last two decades, many genes that display a tendency to undergo somatic mutation in various cancers have been identified.
- A somatic mutation was determined to have occurred when one or more bands appeared in the tumor tissue in addition to those observed in the normal tissue of the same patient.
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