GENEALOGY-DNA-L Archives

Archiver > GENEALOGY-DNA > 2010-02 > 1267081727


From: "Irish III DNA" <>
Subject: Re: [DNA] Hello Mr. Krahn
Date: Thu, 25 Feb 2010 18:08:47 +1100


You wrote:-

You said : "L222.2 is not a back mutation. It is a parallel mutation."
What does it mean to say that a mutation is parallel ?
*****************************************************************************
By parallel mutation means this SNP has been seen in more than haplogroup line.

As Thomas said:-
[[L222.2 is not a back mutation. It is a parallel mutation.
L222.1 shows up in E-M2 samples.
There where several J-L222.2 participants among the WTY participants so far.
I am not aware of any systematic testing strategy/group that tries to
divide J-L222.2 further though.]]

So he is saying it was first seen in Haplogroup 'E' in E-M2 people and that SNP was probably just called L222 at the time.
Then it was seen again in Haplogroup 'J' and this needed to be called J-L222.2 and the earlier SNP renamed E-L222.1 to distinguish
it from when it is seen in Haplogroup J.
If a person refers to L222.1 they are talking about Haplogroup E and if L222.2 is referred to, then they are talking about
Haplogroup J.

A back mutation is when an SNP reverts back in the same line. SRY10831.2 is such an SNP. It was originally seen as a defining SNP
at Haplogroup BT (called SRY10831.1) then it reverted back to its original state as SRY10831.2 defining Haplogroup R1a1.

Dennis


This thread: