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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
However, in the late 1920s, commercial breeders stumbled across a natural mutation that caused tomatoes to ripen uniformly, from an even shade of light green to an even shade of red.
From the earlier studies, DNA sequencing of gyrA showed that all the strains possessed a natural mutation at codon Ser95Thr (AGC [right arrow] ACC) polymorphism, which did not have a significant impact on fluoroquinolone susceptibility (12,13).
It's the latest natural mutation in the region - recently 30ft-long basking sharks were spotted in waters off the Galway coast.
Thus, to develop the most efficient protocols, we designed mutagenized positive controls for all exons for which no natural mutation located in a higher, more stable melting domain was available, including those for which one or more natural mutations located in lower melting domains were present.
The traditional Arabica, such as the Bourbon and its natural mutation Pacas, which represents 97% of coffee plantations, are characterized by their delicacy, acidity and excellent sweetness, by mild and clean flavors, rich aromas and in some cases, by a typically exquisite feature of chocolaty or fruity flavors.