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European nations established only from Medieval times - whites are very new to Europe
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[QUOTE]Originally posted by Knowledgeiskey718: [QB] [QUOTE]Originally posted by meninarmer: [qb] Has nothing to do with Whites turning white due to agriculture. Has everything to do with how Europe is an UV hostile environment to whites and leads to genetic mutation.As far as whites turning white due to agriculture, I know you can turn orange if you consume enough carrots. [/qb][/QUOTE]Wow, agriculture caused Europeans to turn pale, because, agriculture caused Europeans to drastically lose Vitamin D, from their foregoing hunter gatherer fisher herder lifestyle, which they dropped for agriculture which left Europeans in a need for another way to absorb Vitamin D, in which they did, from cow milk which Europeans also recently developed a gene to tolerate lactose, along with the ability to produce vitamin D from synthesizing UVB. These two recent evolutions played a vital role in Europeans after agriculture, and the loss of a ready made Vitamin D diet. [IMG]http://img46.imageshack.us/img46/4784/eurospaleonlyrecentlypu0.jpg[/IMG] Quote from above article [b]"Either way, the implication is that our European ancestors were brown-skinned for tens of thousands of years [/b] --a suggestion made 30 years ago by Stanford University geneticist L. Luca Cavalli-Sforza. He argued that the [b]early immigrants to Europe, who were hunter-gatherers, herders, and fishers, survived on ready-made sources of vitamin D in their diet. But when farming spread in the past 6000 years, he argued, Europeans had fewer sources of vitamin D in their food and needed to absorb more sunlight to produce the vitamin in their skin.[/b] Cultural factors such as heavier clothing might also have favored increased absorption of sunlight on the few exposed areas of skin, such as hands and faces, says paleoanthropologist Nina Jablonski of PSU in State College." ---------- http://www.nytimes.com/2006/03/07/science/07evolve.html?_r=4&pagewanted=2&oref=slogin&oref=slogin&oref=slogin Still Evolving, Human Genes Tell New Story Dr. Wells, of the National Geographic Society, said Dr. Pritchard's results were fascinating and would help anthropologists explain the immense diversity of human populations even though their genes are generally similar. The relative [b]handful of selected genes[/b] that Dr. Pritchard's [b]study has pinpointed[/b] may hold the answer, he said, adding, "Each gene has a story of some pressure we adapted to." Dr. Wells is gathering DNA from across the globe to map in finer detail the genetic variation brought to light by the HapMap project. Dr. Pritchard's list of selected genes also includes five that affect skin color. The selected versions of the genes occur solely in Europeans and are presumably responsible for pale skin. [b]Anthropologists have generally assumed that the first modern humans to arrive in Europe some 45,000 years ago had the dark skin of their African origins, but soon acquired the paler skin needed to admit sunlight for vitamin D synthesis.[/b] [b]The finding of five skin genes selected 6,600 years ago could imply that Europeans acquired their pale skin much more recently. Or, the selected genes may have been a reinforcement of a process established earlier, Dr. Pritchard said. The five genes show no sign of selective pressure in East Asians.[/b] Because Chinese and Japanese are also pale, Dr. Pritchard said, evolution must have accomplished the same goal in those populations by working through different genes or by changing the same genes — but many thousands of years before, so that the signal of selection is no longer visible to the new test. [/QB][/QUOTE]
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