Yojsouth,
Yes, autosomal does give you percentages among other things. That is about
all you could get from the old autosomal testing, but if you test with
23andme and FTDNA you have access to your raw data which shows each
chromosome. There are applications that can be downloaded that will compare
segments of your chromosomes to others or to populations with similar
populations. Since I have not done this type of testing with FTDNA, I don't
know how much information is offer when it comes to understanding their
autosomal results.
The problem with some who do DNA testing is that they do not join some of
the forums or communities that help with understanding the information
tested or who give information on new testing methods. Having the
information analyzed outside of these testing labs can not only tell what
percentage of chromosomes you share with another person, but where.
As for exact Y matches that you mentioned, the mutations or changes in the
DNA should not be an issue since the haplogroup of Jefferson is already
known. If 111 markers were tested and the Hemings match 111 markers,
somewhere the Jeffersons and Hemings shared the same ancestor. The questions
would the be how far back that common ancestor was. I have had a 67 marker
test done and have some that match me 66/67 markers. I know our common
ancestor lived within the last 150 years. So the next step was to compare
genealogical data. If I am correct since I am doing this from memory, the
haplogroup that Jefferson belonged to did not have its origins in Europe,
but in the Middle East even though is it believed the Jefferson family had
its origins in England. Maybe he knew that he was mixed race and therefore
had no issue with Sally being a person of color.
But this for me is getting off the point that I made which is why neither
family is pursuing something that was started? I still say it was because
neither family wants to know the results of the testing.
Linda
-----Original Message-----
From: Jeff Southmayd
Sent: Thursday, September 01, 2011 10:04 AM
To: [log in to unmask]
Subject: Re: [VA-HIST] Sally Hemings is back
I started a family DNA testing group a few years ago and so got into heavy
reading subject in order to be able to handle the inquiries from my family
members in the test group (several of whom turned out not the be Southmayds
after all was said and done, but that's a topic for another discussion
perhaps). While not an expert, I did learn a few things.
Autosomal DNA testing is done to determine the "genetic percentages" of a
person's ancestry from particular continents/regions or to identify the
countries and "tribes" of origin on an overall basis (Southmayds are Kurgan
tribesmen). I don't see how this would further the ball on the TJ-Hemmings
controversy since all of TJ's male relatives would presumably be the same,
assuming they all were exact Y DNA matches (something that is not a fact in
evidence as I understand it and perhaps should be pursued).
What I have also learned is that an "exact" Y haplogroup and DNA profile
match, whether 12 or 111 markers, only isolates a group of potential males,
which can be, perhaps, narrowed down by factors such as "access" and
"opportunity." Based on the current DNA empiracal evidence, and the fact
that other Jefferson males indeed had potential "access" and "opportunity,"
it is impossible to definitively point the genetic finger at anyone as I see
it.
Yojsouth
SOUTHMAYD & MILLER
4 OCEAN RIDGE BOULEVARD SOUTH
PALM COAST, FLORIDA 32137
386.445.9156
888.557.3686 FAX
[log in to unmask]
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********************************************************
> Date: Thu, 1 Sep 2011 11:27:31 -0500
> From: [log in to unmask]
> Subject: Re: Sally Hemings is back
> To: [log in to unmask]
>
> > ... Now there is a test known as autosomal
> > testing ... .If someone was truly interested in
> > proving or disproving the connection between
> > the Jeffersons and Hemings family they
> > would do this test.
>
> Thanks for this information. I'd like to send it to a number of people (on
> all sides of the debate). Has anyone published about it specifically for
> the Hemings-TJ case? Would it require digging up the graveyard at the foot
> of Monticello, or what?
>
> Steve Corneliussen
>
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