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Archiver > GENEALOGY-DNA > 2002-08 > 1030724549


From: lmpa and jg <>
Subject: [DNA] How Specific is 12 Marker test
Date: Fri, 30 Aug 2002 09:22:29 -0700 (PDT)


In a message dated 08/29/02, wrote:


>> Matches----------------Matches out of
>25--------------------Row
>> out of 12____25__24__23__22__21__20 or
fewer___Total
>>
>> __12_______60*_15___3___1___2_____9_________90
>> __11_______na__15___5___3___1_____3_________27
>> __10_______na__na___1___0___1_____2__________4
>> 9 or fewer___na__na__na___0___2____31_________33
>>
>> Col .Total___60__30___9___4___6____45________154

>This is an extremely useful exercise! Combining the
results from different
>projects gives a much clearer picture of the possible
outcomes when upgrading
>from a 12 to a 25 marker test. I guess the moral is
to anticipate anything.
>Some projects end up with more mutations than they
want (thus breaking up
>some matching sets), some end up with fewer mutations
than they want (thus
>being unable to discriminate between different
branches), and some end up
>with exactly the right number (everyone still belongs
together, but branching
>points become clearer).

>This is a good-sized sample, but I was wondering if
you'd be willing to
>maintain this table and update it as more people
upgrade? It would certainly
>be too much to ask you to scan all the projects, but
how about it people notify you?
>

Ann --

I'd be happy to keep the data updated, at least until
Orin releases his database. (From the sound of his
recent message, it sounds like that may be soon!)

In the meantime, if any surname study project
directors
have new results of upgrades from 12 to 25 markers,
please notify me either directly () or
via this list, and I will incorporate your additional
data into the analysis.

-- Julie




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