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Archiver > GENEALOGY-DNA > 2011-01 > 1294013162


From: "Jim White" <>
Subject: Re: [DNA] Recommendations for DNA testing
Date: Sun, 2 Jan 2011 19:06:02 -0500
References: <5F3B12A4D09E4D70AF3C541871E0610D@NEWGAMES><001e01cbaabb$56d99f20$048cdd60$@dgmweb.net><DD790F8C0FD347BEBAF1382ABD84740F@JohnPC>
In-Reply-To: <DD790F8C0FD347BEBAF1382ABD84740F@JohnPC>


Hi:

Am I missing something here ?

My matches at FTDNA are as follows:

a) 12-Exact: 745 Matches (none of which show up in my White Surname
Group

b) 12-1 : 70 Matches

3) 25-Exact: 2 Matches

4) 25-1 27 Matches

5) 25-2 241 Matches

6) 37-Exact: 0 Matches

7) 37-1 0 Matches

8) 37-2 2 Matches

9) 37-3 4 Matches

10) 37-4 7 Matches

11) 67-2 1 Match

12) 67-3 1 Match

13) 67-4 2 Matches

14) 67-6 7 Matches

15) 67-7 2 Matches

Of all the above nearly "1200" Matches, only 1 is a White at 12, but falls
off the map on all other markers.

No close White matches in the 270 25 marker matches.

In the 37 & 67 Marker matches, there are several Whitmore and Wetmore close
matches, but again, there is no Whites.

I have concluded from the above:

1) My White line probably originated as Whitmore/Whitemore/Wetmore.
(possibly "more Whites", at some point in history).

2) The 12 Exact matches are virtually useless, as there are very few
surnames even similar to White.

3) Ditto for the 25 Marker matches.

4) The 37 close matches, and the 67 close matches are the only ones worth
considering. All others do not show anything of significance.

Have I misinterpreted the above results ?

Jim White



-----Original Message-----
From: Alister John Marsh
Sent: Sunday, January 02, 2011 5:39 PM
To:
Subject: Re: [DNA] Recommendations for DNA testing

Diana,

You said.
>>>>>>>
> A 12-marker test can easily debunk a connection -- and a low
> correspondence at
> 12 markers often means you are looking at people in different haplogroups.
> But
> 12 markers can also be enough to support a match, though I'll grant that
> is
> usually not the case. It depends how rare the haplotype and surname are.
<<<<<<<

I have always been in support of people testing only 12 markers if that is
all they can afford initially. And I still am. I assumed that "in most
cases" for same surname matches 12 markers matching exactly would be telling
something useful.

Recently I found two persons of the same surname from the same general area
who were 12/12, and I though I had found an important connection. However,
the two were as different as chalk and cheese when later tested at 67
markers. The two did not have evidence of paper trail connections, but a
connection would have seemed possible based on geography and moderately
uncommon surname. I did suspect a testing error I was so surprised
initially.

So even with a 12/12 match for the same surname in the same area, and a
moderately distinctive haplotype, there is always that 5% or 1% chance that
something unexpected will come up.

I would not cross the road if I thought there was a 1% chance I would not
make it to the other side alive. People just have to make their own
decision on whether they consider a 95% or 99% probability of relationship
is acceptable to them. Testing 67 or over 100 markers certainly increases
the confidence level.

John.


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