| 词汇 | example_english_ancestral-population |
| 释义 | ancestral populationcollocation in Englishmeanings of ancestraland populationThese words are often used together. Click on the links below to explore the meanings. Or, see other collocations with population. ancestral adjective[before noun] uk /ænˈses.trəl/ us /ænˈses.trəl/ relating to members of your family from ... See more at ancestral population noun[C, + sing/pl verb] uk /ˌpɒp.jəˈleɪ.ʃən/ us /ˌpɑː.pjəˈleɪ.ʃən/ all the people living in a particular country, area, ... See more at population Examples of ancestral populationThese 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. On crossing, therefore, the viability and the number of lethal equivalents due to them return to the original values of the ancestralpopulation. However, reliable estimates of relative rates among loci can be expected to reduce the sampling error of the estimated ancestralpopulation size. In some empirical studies, comparisons of fitness between crossbreds and the outbred ancestralpopulation have been used to test for purging. These methods are based on likelihood and take into account the effect of polymorphism in the ancestralpopulation. Note that type 4 and 5 events are observationally indistinguishable, but involve different states of the ancestralpopulation. Clearly, type 2 and 3 events are indistinguishable empirically, but both correspond to a polymorphism that existed in the ancestralpopulation. The only caveat of this method is that the variability in the ancestralpopulation is required for this correction. If so, it would be instructive to have an indication of trematode diversity in the ancestralpopulation. Nuclear sequence data related to the evolution of modern humans were reanalysed and computer simulations were performed to examine the effect of rate variation on estimation of ancestralpopulation sizes. A function is a beneficial effect that existed in an ancestralpopulation for an extended period of evolutionary time, and hence is a cause of the evolution of the adaptation. A missing factor from these experiments is any genetic marker in order to establish that adaptation represents selection from a polymorphic ancestralpopulation, and to exclude any heritable epigenetic mechanism. Compared with the ancestralpopulation, however, crossbreds have a very limited mean increase in viability at low levels of inbreeding, although their number of lethal equivalents is lower. Sequences from different loci share the same species divergence time, while their coalescent times in the ancestralpopulation vary according to the population size of the ancestral species. The first step consists in a description of an ancestralpopulation of organisms. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Doana lynxes have differentiated more from the ancestralpopulation as a result of their longer isolation and lower population size. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. First, the so-called founder effect occurs when founder populations bring only a subset of the genetic variation from their ancestralpopulation. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. All modern humans share the same origin from this single ancestralpopulation. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. In an admixed population, these causal variants will occur more frequently on chromosomal segments inherited from one or another ancestralpopulation. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. A new and more flexible hominin population could have come back to the old niche and replace the ancestralpopulation. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. When an ancestralpopulation extends its range around a geographical barrier and differentiates (despite low-level gene flow), reproductive isolation occurs between terminal populations. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. 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 ancestral Go to the definition of population See other collocations with population |
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