If someone has test results that come out very near the most common
values, there will be many meaningless matches. For example, one of my
grandsons has over 1500 exact 12-marker matches in the FTDNA database,
none of whom share his surname. These results are not very helpful, but
might provide some negative information--if there is a mismatch on 2-3
markers (out of 12) with someone, then you're not related to them. In
cases where there is a very common haplotype (set of results), then you
should test more markers. My grandson with the 1500 12-marker matches
has only about six 25-marker matches, so you can see the increase in
resolution with the additional markers. I usually recommend a minimum
of 25 markers, and I prefer 37. With a common haplotype, that's the
only way to see if you have meaningful matches. I would generally
disregard even 25-marker matches to people with different surnames,
unless there is a traditional genealogical reason to believe that a
person with a specific different surname might be related.
Even a 12-marker exact match to another person of the same surname is
likely to be indicating a relationship, but then you would need to (1)
test more markers to be sure, and (2) use that lead to focus your
traditional genealogical research to show exactly how you are related.
Whit
Carroll wrote:
I have so many 12 marker matches of all sur names... some distant
Carroll matches that are not exact, so what does that tell anyone?
----- Original Message -----
From: Frank Frey <chipfrey(a)comcast.net>
To: carroll-dna(a)rootsweb.com
Sent: Thu, 30 Jul 2009 20:16:51 -0400 (EDT)
Subject: Re: [CARROLL-DNA] Discussion can be helpful
You could see that you may be a match to others in the data-base. That can
lead to a lot of info.
-----Original Message-----
From: carroll-dna-bounces(a)rootsweb.com
[mailto:carroll-dna-bounces@rootsweb.com] On Behalf Of Carroll
Sent: Thursday, July 30, 2009 7:23 PM
To: carroll-dna(a)rootsweb.com
Subject: Re: [CARROLL-DNA] Discussion can be helpful
I am disappointed, with hope that someday I may have some answers.
I am also confused by the findings. If there were any findings at all.
To start
with,in my case, My husband's grandfather was a mystery man who left no
paper trail
to who he was. He was a drifter and probably an only child. My son did the
DNA test,
so he would be generation ONE, my husband generation TWO, my father in law
three, mystery Grandfather Four who was probably an only child, So the
closest match may be the descendant of
Generation five, six, seven or eight. What can I expect with a match from
that scenario?
----- Original Message -----
From: Lura <luraj(a)triad.rr.com>
To: CARROLL-DNA(a)rootsweb.com
Sent: Thu, 30 Jul 2009 15:13:12 -0400 (EDT)
Subject: [CARROLL-DNA] Discussion can be helpful
This mail list has been quiet for too long!
I would like to know who has learned something about their
ancestry because of the DNA test. Who has a success story to
share?
Who is totally confused by the results of the test?
Who was disappointed when they saw the results?
How can someone on this mail list help answer some of your
questions?
Just call me an agitator,
Lura CARROLL Southard
cousin of kit # 32061
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