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Archiver > GENEALOGY-DNA > 2005-11 > 1132414156


From: John Lerch <>
Subject: Verification of JChandler's response
Date: Sat, 19 Nov 2005 09:29:16 -0600


Subject:

Re: Was: [DNA] Predicting haplogroups from haplotypes
From:

(John Chandler)
Date:

Fri, 18 Nov 2005 16:11:55 -0500 (EST)

To:




John wrote:

>> I'm not so sure about JC's post below. NatlGeo told me they were going
>> to do a SNP test and indeed it took an extra 2 weeks from that point.
>> But when I go to my previous customer page,
>

The following response of JC is all absolutely correct it turns out. Poop. (Sticking it to "the man" by getting a freebie would be part of the fun of this hobbie. :-) ) I got an email from a lady who indeed said that I was put on "SNP hold" and that after looking at it again and with additional data pouring in, they "had become confident of putting me in R1a". Translated (it seems to me): A supervisor looked at the number of standard deviations (or whatever measure they use) away from the two nearest candidates (possibly adding in my data to each) and decided to change the protocol to a newer relaxed (cheaper) measure and voila. :-)
JAL
apologies to any employees of FTDNA.
PS another question then. If I take them up on their offer to do a SNP, will I be put in R1a, or does that rate they quote mean they will determine subclades R1a1a (b) (c) etc? (As I understand it R1a and R1a1 are the same thing?) I ask since upon expanding my profile from 12 to 36 with Sorenson, it's pretty clear I am probably R1a as only R1a and a few "unknown" come up on unrestricted YSEARCH. Even so, with a minimum genetic distance of 11 on 36 markers, I have to wonder. Especially since that distance measure is linear without the Bessel fcts computed in (or some other iterative function).

John Chandler wrote
Hold it right there. *Previous* customer page??? From what you said
before, it sounded as if you had come into the DNA testing world by
way of the Genogrphaic Project. If that is not so, then a whole
different scenario presents itself.

Case I. Entry via Genographic Project as a male.
1) NGS has nothing to do with it, except sponsorship. They don't do
any testing, and they don't control what testing gets done. In
short, they have no information about you at all, except what you
told them when you signed up and what FTDNA gives them.
2) FTDNA does the STR testing and uses the project-specific algorithm to
predict the haplogroup if possible. Otherwise, it does a SNP test
in addition to the STR test. The turnaround time for FTDNA SNP
testing is typically *much* more than two weeks.
3) You see your results on your participant page, but that doesn't
tell you what test(s) were actually done.
4) You switch over to FTDNA as a customer and find out for sure.


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