I believe it depends on how closely the individuals match the WAMH (and with more markers, the modal values for their haplogroup). By definition, the modal values are the most common values found for each marker.   If both individuals share several uncommon marker values, then it is highly likely they are related in a genealogical time frame. However, if both individuals share 65 or so of the modal values, then the chance of this match simply being a coincidence is much higher. Raymond T. Wing --- On Sat, 7/24/10, Peter Langley <paircfada@eircom.net> wrote: From: Peter Langley <paircfada@eircom.net> Subject: Re: [Y-DNA-projects] R1b1b2 and 66/67 match To: y-dna-projects@rootsweb.com Date: Saturday, July 24, 2010, 5:23 AM Using my quirky system of a 500 to 1 chance of a mutation taking place: A 66/67 match would have occurred between 4 and 12 generations ago. *But* With parallel mutations, which I think can occur more often than is thought, and also back mutations. You only want one of these to bring the possibility to between 8 and 16 generations. Then of course this is R1b1b and anything could have happened! My guess and a lot of this is guess work 95 per cent chance in the last 20 generations. Peter. ----- Original Message ----- From: "CeCe Moore" <cecemoore@hotmail.com> To: <y-dna-projects@rootsweb.com> Sent: Saturday, July 24, 2010 9:15 AM Subject: [Y-DNA-projects] R1b1b2 and 66/67 match > > Hi, > Can anyone give me an opinion on the reliability of a 66/67 match of a > different surname for a predicted R1b1b2? > Thanks, > CeCe > > > ------------------------------- > To unsubscribe from the list, please send an email to > Y-DNA-PROJECTS-request@rootsweb.com with the word 'unsubscribe' without > the quotes in the subject and the body of the message > > ------------------------------- To unsubscribe from the list, please send an email to Y-DNA-PROJECTS-request@rootsweb.com with the word 'unsubscribe' without the quotes in the subject and the body of the message

I just wanted to let everyone know that I've updated the DNA 101 section on the blairdna.com (http://blairdna.com/) website. DNA 101 has now become DNA 101, DNA 102, and DNA 103. DNA 101 remains pretty much the same and discusses DNA and the Y-Chromosome as it pertains to genealogy. DNA 102 and DNA 103 come from I presentation I gave at a Guild of One Name Studies DNA Seminar in Cheltenham, UK on February 20, 2010. DNA 102 covers what DNA testing can and cannot do and goes into some detail on interpreting the test results. DNA 103 deals with the methods and rationale I use to group participants in the Blair DNA Project. I hope these prove useful to both individuals and project administrators. /*Scottish DNA - Better than Life Insurance* /*John* ------------------------------------ John A. Blair Haywards Heath, England _http://blairdna.com_ _mailto:j_blair@blairdna.com_ BLAIR DNA Project Administrator On 7/24/2010 11:30 AM, Raymond Wing wrote: > I believe it depends on how closely the individuals match the WAMH (and with more markers, the modal values for their haplogroup). By definition, the modal values are the most common values found for each marker. > > If both individuals share several uncommon marker values, then it is highly likely they are related in a genealogical time frame. However, if both individuals share 65 or so of the modal values, then the chance of this match simply being a coincidence is much higher. > > Raymond T. Wing > > > --- On Sat, 7/24/10, Peter Langley<paircfada@eircom.net> wrote: > > > From: Peter Langley<paircfada@eircom.net> > Subject: Re: [Y-DNA-projects] R1b1b2 and 66/67 match > To: y-dna-projects@rootsweb.com > Date: Saturday, July 24, 2010, 5:23 AM > > > Using my quirky system of a 500 to 1 chance of a mutation taking place: > > A 66/67 match would have occurred between 4 and 12 generations ago. > > *But* > With parallel mutations, which I think can occur more often than is thought, > and also back mutations. > You only want one of these to bring the possibility to between 8 and 16 > generations. > > Then of course this is R1b1b and anything could have happened! > > My guess and a lot of this is guess work 95 per cent chance in the last 20 > generations. > > Peter. > > > > ----- Original Message ----- > From: "CeCe Moore"<cecemoore@hotmail.com> > To:<y-dna-projects@rootsweb.com> > Sent: Saturday, July 24, 2010 9:15 AM > Subject: [Y-DNA-projects] R1b1b2 and 66/67 match > > > >> Hi, >> Can anyone give me an opinion on the reliability of a 66/67 match of a >> different surname for a predicted R1b1b2? >> Thanks, >> CeCe >> >> >> ------------------------------- >> To unsubscribe from the list, please send an email to >> Y-DNA-PROJECTS-request@rootsweb.com with the word 'unsubscribe' without >> the quotes in the subject and the body of the message >> >> >> > > > ------------------------------- > To unsubscribe from the list, please send an email to Y-DNA-PROJECTS-request@rootsweb.com with the word 'unsubscribe' without the quotes in the subject and the body of the message > > > > > > ------------------------------- > To unsubscribe from the list, please send an email to Y-DNA-PROJECTS-request@rootsweb.com with the word 'unsubscribe' without the quotes in the subject and the body of the message > > >