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African American DNA Research Forum

Re: Testing on Your Own
In Response To: Re: Testing on Your Own ()

Ok...first and foremost I plead complete ignorance - I have not tried any of these calculations myself, so I can not confirm how valid they are, but this is the example I found. I erased the names to protect the "innocent". I hope this helps. Also, at the end of this example, there is also a link to the DNA Fingerprint site where Thomas Krahn does a calculation using population frequencies. I've pasted the link below.

Tonya

The email begins:

"Hello Thomas,

I sent the results of my DNATribes lab test to the person who heads up the Puerto Rican genealogical project, Dra. Ana ..., and asked for her opinion. Below is her response.

From: Dra. Ana ..., MD
Sent: Wednesday, April 2006
Subject: Fw: RE: [DNA] aSTRs

Your aSTRs were run against a population of other populations with
known aSTRs. The results below show which populations were closest.
It is statistical tool using an exponential number to determine the
most likelihood of representative populations.

For instance Chinese 3.64E+10 is 3.64 x 10 the 10th power. This
turns out to be .0000000000364. You do the same for the rest.
Macau China .00000000000195 compared to Chinese .0000000000364,
makes your ancestry to be about 2x as likely to be from the Chinese
vs. than Macau population. Makes sense when you think that the
Haplogroups A-D came from Mongolia and that we share the same ancestors.

However, I believe as [is stated] below that there is not adequate
representation from Native American populations such as ours in the
OmniPop program.

Saludos,
Ana

........

Here the person tries the calculations for himself:

"I did the math as she explained above, but for the Yupik (Alaska) for whom I got the highest score in the OmniPop and for the score that OmniPop gave for my markers compared to Thai, because the Thai were the highest match DNATribes gave me. (see all scores below)

Yupik (Alaska) (60) 5.71E+10 is 3.64 x 10 the 10th power. This turns
out to be .0000000000571. Thai (45) 2.30E+11 x 10 the 10th power.
This turns out to be .0000000000230. The result is that I'm 2.5X more likely to be from the Yupik vs. the Thai population.

I'm 1.5X more likely to be from the Yupik vs. the Chinese population.
I'm 3X more likely to be from the Yupik vs. the Macau population. In
fact I'm more likely to be from the Yupik vs. any of the other
populations my markers were compared against in the OmniPop.

That's more like it. ..."

*The emailer's OmniPop 150.5 top ten results:

Chinese (15) 3.64E+10
Yupik (Alaska) (60) 5.71E+10
Inupiat (Alaska) (60) 1.15E+11
Vietnamese (15) 1.57E+11
Bangladesh (15) 1.85E+11
Macau, China (36) 1.95E+11
Thai (45) 2.30E+11
Vietnamese (2) 2.41E+11
PC/BT-Asian (4) 3.95E+11
Filipinos (49) 4.09E+11

End of email

........
Here is the DNA Fingerprint example:
http://www.dna-fingerprint.com/modules.php?op=modload&name=Sections&file=index&req=viewarticle&artid=10

If you decide to try out these out - I hope you'll post your findings:0)

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18 Dec 2002 :: 14 Nov 2008
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