Het is niet omdat mutaties aangetoond zijn daarmee aangetoond is hoe spontane mutaties bijdragen aan de evolutie van een soort. De appel en de peren kwestie.
Daar het "founder effect" wel degelijk stelt wat ik heb gestel.
Die site spreekt mij niet tegen, maar ontkent inderdaad de invloeden van natuurlijke selectie niet.
Ik heb altijd gezegd dat nieuwe soorten of verandering in soorten veroorzaakt moet worden en niet spontaan zal ontstaan. Ik heb via isolatie en de out of africa hypothese uitgelegd wat hieronder uitgelegd staat. Nergens staat daar dat het spontaan is gebeurd. Het is niet omdat er mutatie bij staat dat het om spontane mutaties gaat he.
Citaat:
In population genetics, the founder effect is the loss of genetic variation that occurs when a new population is established by a very small number of individuals from a larger population. It was first fully outlined by Ernst Mayr in 1942,[1] using existing theoretical work by those such as Sewall Wright.[2] As a result of the loss of genetic variation, the new population may be distinctively different, both genotypically and phenotypically, from the parent population from which it is derived. In extreme cases, the founder effect is thought to lead to the speciation and subsequent evolution of new species.
The founder effect occurs when a small group of migrants that is not genetically representative of the population from which they came establish in a new area.[3][4] In addition to founder effects, the new population is often a very small population, so shows increased sensitivity to genetic drift, an increase in inbreeding, and relatively low genetic variation. This can be observed in the limited gene pools of Icelanders, Parsis, Ashkenazi Jews, Faroe Islanders, Easter Islanders, and those native to Pitcairn Island. Another example is the remarkably high deaf population of Martha's Vineyard, which resulted in the development of Martha's Vineyard Sign Language.[citation needed]
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https://en.wikipedia.org/wiki/Founder_effect
Als gij zegt dat daar spontane mutaties bij staan, dan heb ik dat gemist.
Ik heb via een andere site aangetoond dat wij blank werden om meer vitamine D op te doen.
Citaat:
Skin lightening could also have been accelerated by something as simple as genetic drift, making it “easier” for a pale skin mutations to succeed in northern latitudes.
Though other elements may have come into play and need to be examined further, vitamin D remains the most likely explanation, Juzeniene stressed, especially given its role in overall health.
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http://www.livescience.com/7863-people-white.html