See Also: spontaneous mutation(medicine)
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spontaneous(dictionary)
SPONTANEOUS(medicine)
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Spontaneous Liabilities(money)

spontaneous mutation (medicine)


spontaneous mutation


A mutation which occurs by itself without first being affected by a mutagen, for example during the process of DNA replication. Spontaneous mutations arise at a remarkably constant rate. The rate that spontaneous mutations arise has been used as an evolutionary clock to estimate how closely related two (or more) separate species are to each other.