linkedin post 2018-02-06 05:17:37

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PLASTICITY AND SPECIATION. “By the plasticity hypothesis, divergence, in the form of alternative phenotypes, life-stage differences, and contrasting traits such as those expressed under extreme or novel conditions, arises first; then particular variants are fixed in particular subpopulations due to assortative mating, environmentally mediated change in expression, or selection. … Extreme plasticity such as learning can produce exceedingly rapid (abrupt) speciation.” https://lnkd.in/eS_4y_J View in LinkedIn
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linkedin post 2018-02-08 05:26:25

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IRREVERSIBLE CHANGE. “To make the change irreversible at the population level, there is no need for one particular mutation (genotype) to be spread throughout the whole population as a result of its differential reproduction – instead, it is possible simply to have one of these billions of mutations in each individual.” https://lnkd.in/eS_4y_J View in LinkedIn
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linkedin post 2018-02-05 13:07:09

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NON SELECTIVE ADAPTION. “A mechanism of evolution that ensures adaptive changes without the obligatory role of natural selection is described. According to this mechanism, the first event is a plastic adaptive change (change of phenotype), followed by stochastic genetic change which makes the transformation irreversible.” https://lnkd.in/eS_4y_J View in LinkedIn
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linkedin post 2018-02-05 13:05:41

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IST LINE IN THE SAND. “On 13 April 1896, H. F. Osborn gave a lecture at the meeting of the Section of Biology of the New York Academy of Sciences, titled ‘A mode of evolution requiring neither natural selection nor the inheritance of acquired characteristics’. According to the neo-Darwinian theory of evolution, such a mode is possible only as neutral evolution. Adaptive evolution has been explained in neo-Darwinism exclusively via the obligatory role of natural selection.” https://lnkd.in/eS_4y_J View in LinkedIn
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linkedin post 2018-02-07 06:18:42

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WITH AND WITHOUT MARKERS. “To have a phenotypic change that is genetically fixed, it is usually assumed that there exists a specific genetic marker or a combination of markers that characterizes the phenotype. However, because a particular phenotype can be genetically fixed via many genetic patterns, it is also possible to have a phenotypic change that is genetically fixed, but without a particular marker common to the population.” https://lnkd.in/eS_4y_J View in LinkedIn
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