Post by Gus Morea on Aug 13, 2004 14:00:57 GMT -5
From AncestryByDNA:
"Lower levels of admixture, particularly in Europeans, require a bit of detective work to interpret. This is because the test does not only report recent admixture events, but we believe, ancient events as well. Because our genetic history is very complex, and interactions between separated populations occurred many times before recorded history, individuals of certain ethnic groups tend to show specific admixture results. Examples include Russians, Scandanavians and Eastern Europeans showing low levels of East Asian admixture (even without a Chinese great grandparent), which possibly arose from widespread interaction between Europeans and Asians during and before the Hun invasions and subsequent ethnic amalgamation. Greeks, Italians, Middle Easterners and Jews reliably and systematically show low levels of Native American admixture (even without an American Indian great grandparent) for anthropological and genetic reasons that are not yet well understood. Thus, when interpreting a result of a low level of admixture (for example, 90% European/10% Native American), it is advisable to do so against a backdrop of what one already knows from other tests such as Y chromosome and mtDNA tests, and paper genealogy such as records and surname searches. For example, a person that gets a 15% NAM score, who has evidence for an Amerind grandmother, and no Mediterranean, Middle Eastern or Jewish ancestry can safely conclude that the test supports their prior knowledge and suggests American Indian or Hispanic heritage. Someone with no prior knowledge could not conclude Amerind or Hispanic heritage from this score, since it could also be from Greek, Italian ... etc. heritage. The same is true with other genetics tests, such as mtDNA results - for example, of the A,B,C,D and X mtDNA haplotypes, only the X haplotype is unique for NAM, and the rest (A, B, C, D) are all found in EAS as well, though lower frequencies."
I find this very interesting, if not odd. Do you think it's a possibility that Med. groups and Native Americans might share some common ancestry from way before the NA's migration to the New World?
Maybe both groups just retain some "primitive" DNA that died out in other groups and was mistakenly interpreted as being only Native American. I'm not versed in genetics, so I have no idea how testing is done or how reliable it is.
(Shees, stuff like this makes me want to hold off on getting my DNA tested, at least for awhile.)
"Lower levels of admixture, particularly in Europeans, require a bit of detective work to interpret. This is because the test does not only report recent admixture events, but we believe, ancient events as well. Because our genetic history is very complex, and interactions between separated populations occurred many times before recorded history, individuals of certain ethnic groups tend to show specific admixture results. Examples include Russians, Scandanavians and Eastern Europeans showing low levels of East Asian admixture (even without a Chinese great grandparent), which possibly arose from widespread interaction between Europeans and Asians during and before the Hun invasions and subsequent ethnic amalgamation. Greeks, Italians, Middle Easterners and Jews reliably and systematically show low levels of Native American admixture (even without an American Indian great grandparent) for anthropological and genetic reasons that are not yet well understood. Thus, when interpreting a result of a low level of admixture (for example, 90% European/10% Native American), it is advisable to do so against a backdrop of what one already knows from other tests such as Y chromosome and mtDNA tests, and paper genealogy such as records and surname searches. For example, a person that gets a 15% NAM score, who has evidence for an Amerind grandmother, and no Mediterranean, Middle Eastern or Jewish ancestry can safely conclude that the test supports their prior knowledge and suggests American Indian or Hispanic heritage. Someone with no prior knowledge could not conclude Amerind or Hispanic heritage from this score, since it could also be from Greek, Italian ... etc. heritage. The same is true with other genetics tests, such as mtDNA results - for example, of the A,B,C,D and X mtDNA haplotypes, only the X haplotype is unique for NAM, and the rest (A, B, C, D) are all found in EAS as well, though lower frequencies."
I find this very interesting, if not odd. Do you think it's a possibility that Med. groups and Native Americans might share some common ancestry from way before the NA's migration to the New World?
Maybe both groups just retain some "primitive" DNA that died out in other groups and was mistakenly interpreted as being only Native American. I'm not versed in genetics, so I have no idea how testing is done or how reliable it is.
(Shees, stuff like this makes me want to hold off on getting my DNA tested, at least for awhile.)
