If skin pigment can change thru prolonged exp to th sun, can it go in reverse...will black people...?

living in the uk become lighter in skin tone through each successive generation...or is it to some extent fixed.





i'm basically asking how changeable is skin colour over time, depending on what the climate is like where you live.

If skin pigment can change thru prolonged exp to th sun, can it go in reverse...will black people...?
I believe it is generally agreed that we came out of Africa, so assume that pale-skinned people's ancestors had darker pigmentation.


With the move to areas with less sun, we needed to be able to absorb Vitamin D more easily, so the black pigment decreased.


I guess that it works both ways over umpteen generations.
Reply:Yes.....in about 100 generations or so.
Reply:As far as i know, skin pigmenation is caused by melanin.





Color is hereditary and genetic. This characteristic is inherited from the dominant race. This is natural.





What you are asking is adaptation. Like, if the skin of Eskimos are thicker than Africans. Humans are capable of adaptation and will evolve over time to protect itself from natural elements.
Reply:I don't think black people can fade unless they have a skin disorder like Michael Jackson.
Reply:Skin colour changes temporarily when you get a tan. This does not have any effect on your childrens skin colour. However, there are natural variances in skin colour within families, and if lighter skin gives some offspring an advantage, then they should be able to have more children, and so lighter skin colour genes spread. Over time, the population gets lighter skin. Thats the basis of the out of Africa theory. It takes a long time though, and nowadays, populations don't stay isolated long enough for differences to spread. We move all over the planet, and have children with people of different ethnicity, both of which are good for our long term survival.