| 单词 | position effect |
| 释义 | > as lemmasposition effect position effect n. Genetics an effect on the phenotypic expression of a gene produced by a difference in its chromosomal position with respect to other genes (esp. mutant genes), or to non-coding heterochromatin. ΘΚΠ the world > life > biology > biological processes > genetic activity > genetic constitution > [noun] > phenotype > phenotypic effects potency1916 pleiotropism1927 position effect1930 penetrance1934 pleiotropy1938 complementation1958 1930 Jrnl. Genetics 22 315 Since the addition of different deletions results in much the same effects, regardless of exactly where the breakage occurred, these are not ‘position effects’ caused by displacement of certain genes from others previously adjacent to them. 1974 Genetic Res. 23 291 Position effect variegation is now regarded as a general phenomenon but it is in Drosophila that by far the largest number of cases have been described. 1991 EMBO Jrnl. 9 2843/2 A-elements stimulate transcription of stably reinserted reporter gene ‘mini-domains’ and protect them from chromosomal position effects. < as lemmas |
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