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The Origins of African-Americans (Redux...)
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[QUOTE]Originally posted by alTakruri: [QB] Again, without knowing all of Skippy's progenitors it's impossible to state he has [i]"only 50% 'sub-saharan' ancestry." "Literally out of 100 of his ancestors (on either side), 50 of them were European."[/i] [b]No, no, no and again, no![/b] Whatever HGs or HTs where used in the test, you must understand something basic. I hope Rasol will come along and give his breakdown once again but in the meantime: Let's take a 54 year old subject today and go back five generations to that persons great-great-great- grandparents of 200 years ago in the days of slavery. The [b]O[/b] represents the subject. The [b]M[/b] is the woman five generations ago whose mtDNA showed up on the test. Let's say she was Cherokee. The [b]F[/b] is the ancestral man as explained above except the genetic tests were done on the Y chromosome. Let's say he was Scotch Irish. The mtDNA and Y chromosome tests only show the matrilineal ancestry through the Cherokee woman's [b]m[/b] 's and the patrilineal ancestry through the Scotch Irishman's [b]f[/b] 's. Five generations ago in 1800, unless there was incest, or cousin matings, the subject has 32 ancestors. Let's say 30 of them were all Fons from Dahomey (modern Benin). [b]They're all those X 's and Y 's the DNA tests miss! [i] They contribute 93.75% to the ancestral make up of the subject. Literally, they make him (or her) what he (or she) is.[/b][/i] The 1 out of 32 Cherokee ancestress and the 1 out of 32 Scotch Irish ancestor do not make the subject 50% Indian and 50% European. Together they only come to 6.25%. All those Dahomey Fons make the subject African. Why wouldn't a responsible tester or company tell their client about this kind of test limitation? Why don't these docudrama writers on the cable tv narrate the truth about what these tests really tell? [CODE] YEAR GENERATION 1950 Ego/Ega O | 1920 1 m = f | | 1890 2 m = Y X = f | | | | 1860 3 m = Y X = Y X = Y X = f | | | | | | | | 1830 4 m = Y X = Y X = Y X = Y X = Y X = Y X = Y X = f | | | | | | | | | | | | | | | | 1800 5 M=Y X=Y X=Y X=Y X=Y X=Y X=Y X=Y X=Y X=Y X=Y X=Y X=Y X=Y X=Y X=F[/CODE]Jumping to DNA conclusions can breed false historic or personal notions, like Skippy being 50% white and having 50 out of 100 European progenitors. Beware of unsupplemented DNA conclusions. At least in Skippy's case somebody finally went used other genetic evidence. [QUOTE]Originally posted by Sundiata: [qb] ^All of that is apparent, though in the particular case which is referenced (the guy on the TV show) the individual (Henry Louis Gates, Jr) was actually shown to have had only 50% "sub-Saharan" Ancestry, maybe I should of mentioned that, it was him personally who complained about "not being black" in his own words (He was just wise-cracking, but literally this is the case since he's mulatto). Literally out of 100 of his ancestors (on either side), 50 of them were European. They had to do some new/different kind of test (as oppose to Y Chromosome or MtDNA) where they sampled his African side and compared it with various ethnic groups and it showed that he clustered along side the Mende people. [/qb][/QUOTE] [/QB][/QUOTE]
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