Case Studies of Natural Selection in Human PopulationsAre Humans Still Evolving?Summarydoi:10.1002/9781118181652.ch7John H. RelethfordJohn Wiley & Sons, Inc.Bajema, C. J . , ed. 1971 Natural Selection in Human Populations. John Wiley and Sons, New York....
In warm climates, natural selection acted in favor of the cyanide-producing clover, but where the winters are cold, non-cyanide clover was favored. Each kind exists almost exclusively in each climate area [source: Purves]. Natural Selection in Humans What about humans? Are we subject to natura...
There are mean differences in complex traits among global human populations. We hypothesize that part of the phenotypic differentiation is due to natural selection. To address this hypothesis, we assess the differentiation in allele frequencies of trait-associated SNPs among African, Eastern Asian, and...
Signatures of natural selection are confounded by population history and variation in local recombination rates. Demographic processes should affect all loci in a similar way, whereas the effects of selection should be restricted to specific loci. ...
"But it also empirically tests one of the most gripping and fundamental questions asked by scientists across many disciplines and decades: Is there evidence of ongoing natural selection in humans and, if so, what is it and how does it operate?" ...
2.4.3 Natural Selection Natural variations exist among the individuals in any population. Many of these differences do not affect survival or reproductive fitness (e.g. the eye color variations in humans), but some differences may improve the chances of survival of a particular group of ...
For instance, humans shared a common ancestor with chimpanzees about 6 million years ago. Peppered moths offer an example of rapid natural selection during the industrialization of the United Kingdom. Commor pale-coloured peppered moths became conspicuous on tree trunks that had darkened with soot,...
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A probable explanation of the evolution of sex differences in ageing is that, in polygynous species, intense intrasexual competition between males restricts the number of seasons for which individual males are able to breed successfully, weakening selection pressures favouring adult longevity in males ...
Natural selection, competition for humans everywhere, and one's life, no competition is impossible. 翻译结果3复制译文编辑译文朗读译文返回顶部 Natural selection, competition for humans everywhere, and one's life, no competition is impossible. 翻译结果4复制译文编辑译文朗读译文返回顶部 selection and compe...