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White Europeans speak about black Europeans
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[QUOTE]Originally posted by Elmaestro: [QB] [QUOTE]Iirc, Rana or Rees or Mekova inferred /interpreted the pattern as “removal of constraint”. I will have to go back to my early postings on ESR. I believe I created a thread on it several years ago. Because of that statement I remember I challenged Swenet/Kalonji on pigmentation of Native Americans entering North America from Asia. Did they enter as dark or light skin? Why is that important and the significance? [b]And why I don’t believe it is “slection” for light skin? Because Native American show the same pigmentation pattern as Africans[/b]. Darkest closest to the equator and lightest further away from the equator. It has absolutely nothing to do with sexual preference or selection. It is the NATURAL order of things. So the follow-up question ..WHY? Why are Central Americans dark, if 1000 individuals of the same tribe(of the same pigmentation color – whichever) crossed into Alaska and migrated south. Did the native American women told the light skin men to stay behind. Lol! “Only blacks allowed” in Central America? Lol! You see how ridiculous this sexual preference theory is? [/QUOTE][b]Do They?[/b] and if they follow a pattern, how much of it is because of [i]genetics[/i]? The Amerindians entered america with the same amount of variation available to earlier East Asian populations followed by ensuing bottlenecks which was inferred by Rana's results having all 5 of the Amerindian sample scoring [b]Homozygous[/b] for Arg163Gln, other than that I haven't seen any evidence for sweeping selection at the equatorial level. However, regardless of the genetics we will always see a correlation between UV exposed areas and local pigmentation, because of 2 things which I can't express how much they're overlooked. 1. Melanogenesis and 2. the Epigenome. [i][b]For Those unfamiliar with what those two things are as they relate to this discussion[/b] - Melanogenesis is the process & regulation for which we produce and localize melanosomes. A Laymen term for this is tanning, there are 4 collective stages to tanning, an immediate stage which produces grey pigment and happens so fast it is undetected, two intermediate stages which are the ones we're familiar with, one last for a day and the other lasts for 2 weeks or so based on prolonged sun exposure... the 4 stage though is referred to as permanent (though not necessarily permanent) and this can last for months even years knocking a subject's skin tone down multiple shades. Epigenetics involves the regulation of genes through methylation and acetylation of regions located at a targeted loci. This can be a result of imprinting (being passed down from parents) or adaptation via environmental factors. for example you can have a subject with a permanent tan one side of their body due to prolonged UV exposure during developmental stages etc. **NONE OF THESE TWO THINGS HAVE AN EFFECT ON THE GENETIC MAKEUP OF DNA.**[/i] [/QB][/QUOTE]
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