| 词汇 | cline |
| 释义 | cline noun[ C ] science, social science, language specializeduk /klaɪn/ us /klaɪn/ a scale(= set of numbers, levels, etc.) on which things can be arranged in order according to a particular feature or quality: 渐变群 In some species, the phenotype and genotype of the species varies along a cline.一些物种的表现型和基因型在一个渐变群的范围内变化。 Classifying and creating order alphabetize anti-hierarchical arrange arrangement arranger concordance describe macrocosm misclassification misclassify miscode mislabel misorder pigeonhole short-list shortlist sort sort something out spring-clean unstructured You can also find related words, phrases, and synonyms in the topics: Order and sequence - general words Examples of clinecline Overall, the clines tended to be wider the further they were from the race centre. Stochastic simulations are necessary for a full understanding of clines in polygenic traits. A step cline in a trait determined by an infinite number of unlinked loci. However, this is compensated by the narrowing of the clines, which reduces the width of the region over which neutral allele frequencies are steepened. However, adjacent clines would tend to annihilate each other, and some mechanism is needed to generate cryptic divergence. Moreover, the neutral clines may be curved away from the barrier. Genetic drift in clines which are maintained by migration and natural selection. Clearly, sampling only a subset of the characters may have failed to reveal the occurrence of non-coincident clines. The aim of this paper is to give an overview of the theory for clines in an additive polygenic trait. There has been surprisingly little empirical work on the quantitative genetics of clines. This level of challenge is a function of the evolving farming system rather than more variable clines such as the degree of tick control. However, numerical solutions suggest that the outcome is qualitatively similar, in that a set of scattered clines is maintained. This is because for small there is little selection amongst the genotypes found at the centre, and so the clines there are shallow. However, these clines may not occur on other continents or in other species. Some authors have suggested that mean temperature changes along clines are the main selective factor. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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