- Location Mother
Biogeographical ancestry testing, available from DNA Print Genomics (www.dnaprint.com), is the second type of autosomal testing. They test all of your genetic contributions for specific, proprietary markers that indicate geographical heritage, not just the Yline or mtdna. They do not use the Codis markers, but use, depending on your test selected, between 500 and 1349 markers they?ve discovered to be relevant to ethnicity.
Your results are reported within confidence bands, which indicate a range of percentages that might actually be accurate. This is shown above by the bands surrounding the red dot which shows the ?most likely? result. The margin of error is often as high as 15%. Typically, there is no dispute over the majority ancestral type. However, minority types are apparently much more difficult to discern.
There are only two tests that can provide you with solid evidence of the source of your Native American or other ethnic ancestry. Those are yline and mitochondrial dna tests. It?s important to try to fill in the blanks in your family tree pedigree chart by testing relatives who carry the yline and/or mtdna of the lines of your tree that you cannot personally be tested for.
In addition, two types of autosomal testing can provide useful clues as to the percentage of your ethnic heritage and the geographical source. Percentages of the 4 major world populations (Native American, African, Indo-European and Asian) are available using the DNA Print test.
Codis marker testing is another type of autosomal test used to determine the Codis marker values which in turn can be used to map those marker values against known population groups. Tribes provides this service for an additional fee using their own internal database.
DNAexplain provides autosomal analysis services for Omnipop and other public databases in addition to analysis services for yline and mtdna test results.
All genetic genealogy results need to be accompanied by genealogical research to unravel the historical context for the lives and trials of our ancestors. DNA testing may well answer the question what and who, but the why is typically revealed only by studying the history of the times in which they lived.
Copyright 2007, Roberta Estes, all rights reserved