How long can a pure European turn into a pure Asian?

[neclar]

According to evolution, if some families of pure Europeans migrate to Japan, South India or East China, how long will they look 100% pure phenotypically in the regions where they migrated?
They, of course, live in isolation without interfering with the populations of the area in which they migrated and everything being only in terms of evolution.
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[gixajo]

I would say that in 5-6 generations aprox. genetically, and maybe physically even in fewer generations (3-4). of course this varies depending of every individual and how close is the original ethnicity to Asians.(I supose that Black traits tend to be more difficult to "dissolve" than European ones).

Mixing in each generation with "pure" Asians , whatever their ethnicity of origin was, autosomally in 5 generations will be practically similar to anyone of their environment (aprox. 97%), although there may always be some very residual trait that reminds the ethnic group of their ancestor phisically (or maybe not).

[neclar]

I would say that in 5-6 generations aprox. genetically, and maybe physically even in fewer generations (3-4). of course this varies depending of every individual and how close is the original ethnicity to Asians.(I supose that Black traits tend to be more difficult to "dissolve" than European ones).

Mixing in each generation with "pure" Asians , whatever their ethnicity of origin was, autosomally in 5 generations will be practically similar to anyone of their environment (aprox. 97%), although there may always be some very residual trait that reminds the ethnic group of their ancestor phisically (or maybe not).

Yes, but I mean that these Europeans who arrived in Asia will never mix with the Asian population in the area. These Europeans will marry only among themselves, they will live completely isolated. Never mix. How long will they have a 100% Asian phenotypic appearance, due to evolution and adaptation to the environment? Without having even 1% Asian ancestors but only pure Europeans.

[Petalpusher]

According to evolution, if some families of pure Europeans migrate to Japan, South India or East China, how long will they look 100% pure phenotypically in the regions where they migrated?
They, of course, live in isolation without interfering with the populations of the area in which they migrated and everything being only in terms of evolution.
4500px-A_large_blank_world_map_with_oceans_marked_in_blue.svg.png

Huh...they will never change, why would they? Maybe in tens of thousands of years they would change, not necessarily in Asians either. If there was any sort of evolutionary pressure, but it's not much the case anymore.

[gixajo]

Yes, but I mean that these Europeans who arrived in Asia will never mix with the Asian population in the area. These Europeans will marry only among themselves, they will live completely isolated. Never mix. How long will they have a 100% Asian phenotypic appearance, due to evolution and adaptation to the environment? Without having even 1% Asian ancestors but only pure Europeans.

You mean more or less, for example, if right now Japan would run out of population and be repopulated with Europeans?

Most likely, Europeans in Japan, if that happened right now, would not evolve into an Asian type, as Petalpusher says, they would maintain the European phenotype until successive mutations over thousands of years made them evolve to an unknown phenotype, which by the "randomness" of the evolutionary mechanism that we still do not fully know we cannot foresee.

Maybe European people in tropical places would evolve towards darker phentoypes or negroid people in areas of the earth with colder climates and very little insolation into lighter ones , but it is a slow process that would take thousands of years to reach a totally different phenotype, and I suppose it also requires extreme conditions to speed up the process.

[Petalpusher]

I think in general for groups to drastically change in appearance, you have to put immense environement pressure on them. When Eurasia was populated it wasn't even a matter of selection but simply life and death at every turns, a pressure out of this world to survive, that certainly speeded up selection of mutations related to certain attributes. While in other places under the equator you can sleep under the stars, in most of Eurasia, you would have died every night without serious countermeasures, if you weren't starving to death already in the ice age.

A good example are Papuans, they are very far from SSA (Europeans are actually closer) and yet they look superfically much more like Africans. Which means they ve removed themselves genetically from them, without especially selecting different traits, at the surface at least, because they were still living in a tropical place. At any rate, it's not like anybody is trying to survive butt naked in the wild in any civilized place today. We are probably about a couple of hundreds years before biological life is replaced by something else anyway, synthetic or whatever. Human evolution is likely over already for the most part, unless something cataclysmic happens.

[reboun]

10,000 years.

[neclar]

10,000 years.

If so, it means that Turks who migrated to Anatolia and Europe, coming from populations that existed 1000 and 2000 years ago respectively in Central Asia and the Altai, are actually 10-20% less phenotypic Asian just because of the evolution . And so, not only phenotypically but also genetically, they turned 10-20% into Anatolians and Europeans, because of evolution.

And I can't find out their true percentage of real Turk from DNA tests or phenotype. Not? They would get 10-20% less. (1000-2000 years).

[reboun]

If so, it means that Turks who migrated to Anatolia and Europe, coming from populations that existed 1000 and 2000 years ago respectively in Central Asia and the Altai, are actually 10-20% less phenotypic Asian just because of the evolution . And so, not only phenotypically but also genetically, they turned 10-20% into Anatolians and Europeans, because of evolution.

And I can't find out their true percentage of real Turk from DNA tests or phenotype. Not? They would get 10-20% less. (1000-2000 years).

I guess they mostly lost their Mongoloid percentage by mixing with native Anatolians but also lost some part due to adaptation to the climate and geography of Anatolia.

[Nurzat]

by mixing? it can be as soon as two generations, or even one, like halfies could look full Asian to an European