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Author Topic: What can you learn from a 12-marker DNA test?  (Read 2543 times)
Marilyn Teaff Barton
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« on: October 28, 2006, 12:23:35 PM »

The basic test tells you your deep ancestry (called Haplogroup) - think 1000s and 10,000s of years.? It is usually insufficient for genealogical purposes.? Some haplogroups give you an insight to a location which is not your typical western europe, but many results are for the most common european haplogroups - which are found in most european countries.? You get some generalities and probabilities from the haplogroup.
 
The yDNA (paternal or surname) and mtDNA (maternal) tests will not give you percentage of ancestry by geographic group.? Only one test that I am aware of purports to do that and it is not well respected by genetic genealogists - as its accuracy is not sufficient for the desired purpose and the results are often in conflict with known paper trails.
 
A surname yDNA test is useful in determining if you share your surname male ancestry with another man (men) who has been tested.? By comparing your paper trails, you can learn more about your ancestry.? I encourage you to post your pedigree and help get your project started by getting your own testing.? You'll also benefit by recruiting other researchers in this surname group - as your learning is in determining who you match
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joeflood
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« Reply #1 on: February 16, 2007, 09:14:03 PM »

Weve found that 12 marker tests are actually very useful for telling who is NOT related. We already have four different haplogroups in our COAD project - and we were able to tell one lady she was clearly from the Wexford Ireland branch because they are the only ones with the rare E3b haplogroup.

12 marker tests can be useful for a lite paternity test too, if the parents (or two proposed fathers)  come from widely different parts of the world. In that case, a match on a 12 marker test is usually more than enough, though it wont hold up in a court of law.
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