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O.T. Races Exist: Global variation in copy number in the human genome
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[QUOTE]Originally posted by Clyde Winters: [QB] Rasol [QUOTE] Skin coloration in humans is adaptive and labile. Skin pigmentation levels have changed more than once in human evolution. Because of this, skin coloration is of no value in determining phylogenetic relationships among modern human groups. [/QUOTE]You should tell this to X-Ras. I use Black/African as a racial term like the authors of the study under discussion. Just like we say White South Africans to refer to the Europeans in South Africa. [QUOTE][b] http://tinyurl. com/yh7kp2 There are just under 30,000 genes in the human genome, which consists of about 3 billion "letters" of the DNA code. The scientists found that more than 10 per cent of these genes appear to be multiplied in the 270 people who took part in the study. They do not know why some genes are copied and some are not. One gene, called CCL3L1, which is copied many times in people of African descent, appears to confer resistance to HIV. Another gene involved in making a blood protein is copied many times in people from south-east Asia and seems to help against malaria. Other research has shown that variation in the number of copies of some genes is involved in Alzheimer's and Parkinson's disease. Are there any other practical applications? The scientists looked at people from three broad racial groups - African, Asian and European. Although there was an underlying similarity in terms of how common it was for genes to be copied, there were enough racial differences to assign every person bar one to their correct ethnic origin. This might help forensic scientists wishing to know more about the race of a suspect. Who made the discovery and where can we read more about it? Scientists from 13 research centres were involved, including Britain's Sanger Institute in Cambridge, which also took a lead role in deciphering the human genome. The research is published in Nature, Nature Genetics and Genome Research. [/QUOTE][/b] . [/QB][/QUOTE]
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