| 词汇 | example_english_positive-selection |
| 释义 | positive selectioncollocation in Englishmeanings of positiveand selectionThese words are often used together. Click on the links below to explore the meanings. Or, see other collocations with selection. positive adjective uk /ˈpɒz.ə.tɪv/ us /ˈpɑː.zə.t̬ɪv/ full of hope and confidence, or giving cause for hope ... See more at positive selection noun uk /sɪˈlek.ʃən/ us /səˈlek.ʃən/ the act of choosing someone ... See more at selection Examples of positive selectionThese 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. Previous studies that reported evidence for positiveselection should be revisited, particularly for data derived from sources reasonably expected to have experienced recombination. We present three speculative hypotheses in an attempt to explain why lysins are acted on by positiveselection. Furthermore, if positiveselection was detected in a region, it would not be possible to localize the signal to individual sites. Consequently, exceeding these rates would be expected to yield a conservative test for positiveselection. But of course it doesn't; rather, adaptation (positiveselection for a function resulting in altered trait structure) does. However, the identification of sites that might have experienced positiveselection should require them to be outside the false-positive distribution, not within it. A method for detecting positiveselection at single amino acid sites. The second checkpoint is 'positiveselection', which occurs after selection has signalled the cell to rearrange the chain genes. Positiveselection is mostly invoked to explain such a lineage-specific acceleration of substitution rates in comparison with close relatives. Short branches of selffertilizing lineages could explain why we did not detect positiveselection in these lineages. Positiveselection on the heron's neural system to use the wing for shading involves adaptation. Immune-mediated positiveselection drives human immunodeficiency virus type 1 molecular variation and predicts disease duration. Selection may take several forms, and we are here concerned with purifying and positiveselection. The signature of positiveselection at randomly chosen loci. It is the analysis of the balance between constraints, constraints removal, and positiveselection that leads to the understanding of evolutionary changes. As we accumulate more clones, we will have the capacity to test evolutionary hypotheses, such as positiveselection and co-evolution of asterosap and its receptor. Negative depletion (which excludes those cells that are definitely not stem cells) is another method, and is often used in combination with positiveselection. We also found that positiveselection could be more efficient in outcrossing than in self-fertilizing species, in agreement with the dead end theory. The process therefore appears similar to thymocyte positiveselection. 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. Want to learn more? Go to the definition of positive Go to the definition of selection See other collocations with selection |
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