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Thread: Is Y-Chomosome Genetics Accurate in Determining Race and Looks?

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    Post Is Y-Chomosome Genetics Accurate in Determining Race and Looks?

    Are Y chromosome genetics accurate at determining race and looks? Or does it basically determine geography? I think there must be other factors counted and more important ones too.

    Thank You

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    Quote Originally Posted by Robert286
    Are Y chromosome genetics accurate at determining race and looks? Or does it basically determine geography? I think there must be other factors counted and more important ones too.

    Thank You
    Robert,

    Y chromosome genetics can only tell you about one line of descent. Twenty generations back, you have 1,048,576 ancestors, minus the ancestors lost through inbreeding (no offense: we're all inbred on a larger scale). But only one of those million + ancestors possessed your y chromosome. As for the rest of your nuclear genome, he has to share that space with the other million souls of 40 generations ago who made you who you are (biologically speaking), so y chromsome genetics cannot by itself tell you much of a person's overall ancestral makeup. For example, of a number of people tested who described themselves as solely African American, almost 30 percent of them had European y chromosomes (see: http://www.dienekes.com/blog/archives/000115.html ).

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    Post Is Y chromosome Genetics accurate

    This is an interesting point Dishdawg. Would not the same reasoning apply to mtDNA? What is of interest to me is that you cite over 1000 ancestors yet only one would register using Y chromosome or mtDNA. This is of interest since one or more of these ancestors in a given family line could have been Neanderthal and there might be no record whatsoever. My reason for bringing this up is my basic problem with explaining the uniqueness of the white race over the relatively short time sapiens left Africa (80,000-100,000 years), not to mention the variability of Asians, Australians and American Indians who also were part of this same non-African group. It just seems to me logical that we all absorbed some genes from existing populations and it is this non-sapiens inheritance which makes each population unique.

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    Y-chromosome and mtDNA markers are only useful when analyzing populations.

    At an individual level, autosomal DNA is much more indicative of one's ancestry.

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    Y chromosone haplogroups can differ and be similar in different regions, its nothing to do with modern racial categorizations of nationality, its simply a HUMAN recessive allele. People tend to confuse it with racial similarity (although they will be more similar to people of similar regional origins).

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