| 释义 |
DictionarySeemutationspontaneous 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. spontaneous mutation
spon·ta·ne·ous mu·ta·tiona mutation that arises naturally and not as a result of exposure to mutagens. Synonym(s): natural mutationspon·ta·ne·ous mu·ta·tion (spon-tā'nē-ŭs myū-tā'shŭn) A mutation that arises naturally and not as a result of exposure to mutagens. spontaneous mutation a MUTATION occurring in the absence of a known mutagen. In humans, a typical rate of spontaneous mutation is between 1× 10-5 and 1×10-6 mutations per gamete formed. The rate varies considerably between different organisms, perhaps reflecting different DNA repair systems at work.LegalSeeMutationAcronymsSeesamarium |