Timeline for What factors are known to affect evolution?
Current License: CC BY-SA 3.0
14 events
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| Apr 14, 2018 at 14:26 | comment | added | Remi.b |
@KennyPeanuts You might want to add something like If one were to use another definition of evolution (see [How to define “evolution”?](https://biology.stackexchange.com/questions/11400/how-to-define-evolution) for a discussion), of course the below list of mechanisms that are driving evolution would be different. to deal with users that are bothered by the quite standard definition you're using. +1
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| Apr 11, 2018 at 3:50 | comment | added | John | In the real world this boils down to does it have heritable characteristics and does it reproduce? If yes to both it will evolve. good answer though | |
| Apr 10, 2018 at 17:30 | comment | added | DQdlM | @Bugmo I already had "no sexual selection" in the answer so the whole random mating issue is covered. Nonetheless, it does appear to have caused confusion so, I agree it is best removed. | |
| Apr 10, 2018 at 17:28 | history | edited | DQdlM | CC BY-SA 3.0 |
removed the controversial stuff on random mating
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| Apr 10, 2018 at 1:52 | comment | added | Bugmo | I downvoted for the removal of random mating. As sol noted, it is critical to the understanding of evolutionary change in a population. | |
| Sep 12, 2017 at 9:10 | comment | added | sol | Please, delete your edit and reintegrate "random mating" as it is the major factor to explain evolution (eg ebd10.ebd.csic.es/pdfs/Duminil_etal_2007_AmerNat.pdf ; Charlesworth (2003, p. 1052): “The mating system is probably among the factors with major effects on variability, clear enough to be discernible even in the presence of other factors.” | |
| Sep 12, 2017 at 9:10 | comment | added | sol | You have to leave random mating. First, releasing random mating will change genotype frequencies SO it is evolution. eg : aa = blue Aa=green AA=brown, if not random mating, this biological feature will change its frequency, so population evolved. Moreover, you think human/mammals but many species also reproduce using clonality (so no "mating") which change again the evolution of both genotype and allele frequency. By the way, "random mating" includes 2 factors of evolution: reproduction modes (clonal vs sexual) and mating mode (selfing, inbreeding, panmixia, outcrossing). | |
| Jun 13, 2016 at 14:40 | comment | added | DQdlM | @Remi.b thanks for your comments. I agree with your feedback so I have edited the answer in response. Thanks. | |
| Jun 13, 2016 at 14:38 | history | edited | DQdlM | CC BY-SA 3.0 |
removed non-random mating based on comments
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| Jun 12, 2016 at 23:25 | comment | added | Remi.b | The answer is actually partially wrong. I agree that under all of the above conditions, no change in allele frequency can occur. However, this is true even if you drop the last condition (random mating). In absence of random mating (and in presence of the other conditions), genotype frequencies may change through time (and differ from Hardy-Weinberg's predictions) but allele frequencies would still remain constant. | |
| May 23, 2012 at 11:46 | vote | accept | blunders | ||
| May 23, 2012 at 10:57 | comment | added | DQdlM | @blunders natural selection requires heritable variation and a survival or reproductive advantage based on that variation. The ultimate source of all variation is mutation but note that the thing that evolves is a population, so you can change the allele frequency by having individuals enter or leave a population. This would be an evolutionary event unto itself but would also potentially add more heritable variation that natural selection could act upon. | |
| May 23, 2012 at 1:39 | comment | added | blunders | +1 @DQdlM: Awesome! Knowing now that Hardy-Weinberg appears to be the source of the logic was a huge help, and you're answers was within my range of plain-English. Taking a step back from "bio-lingo", would it be correct to say that the "inputs" for natural selection are only mutation(s) and/or statistically significant changes in the way the organism interacts with the environment? Also, assuming mating was completely random, why would emigration affect evolution? Meaning it would appear that other conditional changes would be the source of the evolutionary change, not emigration. Thanks! | |
| May 23, 2012 at 1:09 | history | answered | DQdlM | CC BY-SA 3.0 |