| 单词 | mutation pressure |
| 释义 | > as lemmasmutation pressure mutation pressure n. Genetics the tendency for recurrent mutation (rather than selection) to alter the frequency of a particular allele within a population, or more generally to affect the genetic constitution of an organism. ΘΚΠ the world > life > biology > biological processes > genetic activity > [noun] > changes or actions of genes or chromosomes > mutation sporting of nature1666 sporting1827 saltation1870 mutation1904 point mutation1921 mutation pressure1929 macromutation1940 micromutation1940 mutagenesis1950 1929 Amer. Naturalist 63 276 It might be suggested that mutation pressure is the factor which reduces useless vestigial organs beyond the stage at which they can exert any conceivable detemerious effect. 1962 D. J. Merrell Evol. & Genetics xxiv. 237 Theoretically mutation pressure alone could bring about evolution. 1996 R. Dawkins Climbing Mount Improbable (1997) iii. 71 Mutation pressure does not systematically drive in the direction of improvement. < as lemmas |
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