spontaneous mutation

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Related to natural mutation: induced mutation

spontaneous mutation

[spän′tā·nē·əs myü′tā·shən]
(genetics)
A mutation that occurs spontaneously, that is, in an individual not specifically exposed to a known mutagen.
References in periodicals archive ?
This suggests that German red foxes could harbor the direct ancestor of CPV, although it remains possible that the intermediate red fox parvovirus emerged from conventional CPV-2 by one point natural mutation (Figure 3).
Or, more likely, it's a natural mutation or reversion to the original plant.
SB-728-T is an autologous CD4+ T-cell product in which the gene for CCR5, a co-receptor for HIV entry, is modified via ZFN-mediated genome editing to prevent the CCR5 protein from being expressed, mimicking a natural mutation (CCR5 delta-32).
To be sure, new viral diseases occasionally emerge after a natural mutation suddenly broadens a virus' host range or virulence.