| 释义 |
pseudoallele Genetics.|sjuːdəʊˈæliːl|
[f. pseudo- + allele, or a back-formation from pseudoallelism.]
Each of two or more mutations that resemble alleles of a single gene functionally, in affecting the same process or property, but differ structurally, in that crossing-over is possible between them.
1948Genetics XXXIII. 113 The bithorax mutants, bx and bx3 (locus, 3–58·8), are pseudo-alleles of bithoraxoid-dominant, bxdD. 1956Nature 17 Mar. 504/2 Phenomena such as position effect and pseudoalleles make the classical corpuscular picture of the gene obsolete in modern genetics. 1962W. R. Singleton Elem. Genetics xiv. 235 In any organism susceptible of precise analysis, pseudo⁓alleles have turned out to be the rule rather than the exception. 1975V. Grant Genetics of Flowering Plants iv. 75 The pseudoalleles are so close on the genetic map that crossovers between them occur only very rarely.
So pseudoaˈllelic a., behaving as or consisting of pseudoalleles; pseudoaˈllelism, pseudoallelic state or property.
1938Yearbk. Carnegie Inst. XXXVII. 305 Any dominant mutant which is lethal when homozygous and which shows pseudo-allelism to a dissimilar, non-allelomorphic but neighboring mutant is probably a deficiency. 1948Genetics XXXIII. 113 Pseudo-allelism is characterized by the presence of closely linked genes, which seem to act developmentally like one. 1953Adv. Genetics V. 208 The most completely investigated pseudo-allelic series is the case of ‘lozenge’. 1975J. B. Jenkins Genetics ix. 388 Primarily as a result of the analysis of pseudoallelic series, the gene emerged conceptually as a unit of function, or cistron. 1975V. Grant Genetics in Flowering Plants iv. 74 The phenomenon of crossing-over within the limits of what had been considered a gene became known as pseudoallelism. |