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African American DNA Research Forum

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

Hi Chris,

This is what I know about autosomal dna:

Autosomal DNA are the 22 pairs of non-sex chromosomes found in the nucleus. Autosomal DNA testing will perform a scan throughout ALL YOUR CHROMOSOMES to find the answer to your genealogical questions. The benefits of autosomal testing are that you can verify/establish nuclear family relationships, there are no gender limitations such ass with mtDNA and y-chromosome dna testing.

This is what I wrote in my original post about "TESTIING ON YOUR OWN", when I posted the link to download the omnipop spreadsheet:

"The result only tells you, where your average ancestor most likely comes from. "Average" in this case means,that if your mother comes from China and your father comes from South Africa, your might end up with a best hit in India, because India is right in the middle of the two countries of origin. ***You will not be able to trace a single line with autosomal markers like it is possible
with mtDNA or Y-DNAin to a direct maternal or paternal line.***"

With regards to splitting the STR profile numbers, this is what I said in the post:

"...I was told, however, that you can split the STR profile numbers (CODIS Markers) in half. For example, place the first four markers into the green cells on the spreadsheet, and print a copy of the world map results with only those four markers, then delete those four and put in the remaining CODIS Markers in thier appropriate green cell - print a copy of that map. Now compare the two maps for similiarities. You're looking for the areas on the map that have clusters of 10 to 15 blue/green/black dots. For example, in my case, the areas around Spain and Portugal remained the same on both maps."

With Autosomal DNA testing you are looking at your own combination of dna data, unfortuantely, you can not split out your mother and father's information from your STR data. When I noticed you mentioning that you could split the STR information to look at your mother and your father's information separately, I thought perhaps you had had some other sorting of testing done. Or that you had had results from another company and you had decided to use a different excel spreadsheet to evaluate your results, not the omnipop. I'm sorry but I was not following those posts very closely. The omnipop will not allow you to compare your mother's data with your father's data to determine who may be what (i.e mother from Senegal, father from Eygpt). It will only look at your own dna combination as a whole.

Here's what Thomas Krahn/I meant by splitting the cells in omnipop:

(These are not my real numbers, by the way)

Put the appropriate numbers in the first 4 cells, like this:

D8S1179 15 12
D21S11 27 28
D7S820 8 10
CSFIPO
D3S1358 14 17

This is the first group of numbers - with just these numbers listed - print your map. Now delete these number and enter the second set of numbers, like this:

THO1
D13S317 12 10
D16S539
D2S1338
D19S433
VWA 15 20
TPOX
D18S51 14 17
D5S818 10 13
FGA 19 20
Penta D
Penta E

Now print the map with only these numbers listed.

Compare both of your printed maps for similiarities. YOu will notice that there are certain CLUSTERS of 10 to 15 dots that remain unchanged on both maps. This cluster of dots is where your ancesters MAY have a strong link to. For example, when I did this the cluster of dots that did not change at all on both maps were in the area of SPain and Portugal.

DO not just look at one or two dots on the map that remain the same and assume that there is a connection to you there, you want to look at ONLY the large clusters of dots that are similiar, again, the ones with 10 to 15 dots clustered together that remain virtually unchanged on both maps.

I hope this helps.

Tonya

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Testing on Your Own
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18 Dec 2002 :: 14 Nov 2008
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