I have a question please about likely DNA mutation rates So far, I have only managed to Y-37 test 18x ADSHEADs each in different Trees These form two quite separate genetic groups plus 3x odd-balls. In one group of 6x Manchester based trees:- 2 are identical at 37 markers and the other 4 all differ by one marker, but each at a different site. The two with the same signature at Y-37 have just up-graded the test to Y-67 and they remain completely identical at all 67 markers. This tends to confirm that the two documented heads of these trees <David bap.Manchester Cathedral 1750 : Father John> and <Nathaniel bap.Manchester Cathedral 1752: Father John> are in fact brothers. My issue is that the two persons tested are each 7 generations down from their presumed common ancestor John ie There are 14 births involved with apparently no mutations. Can anybody give me some idea please Is this a common or rare situation ? Or better still could you point me at some sort of quantification of the known mutation rates of each of the 67 markers So I can work out the probability of No mutations in 14 births. Many thanks Gordon [+Z] Gordon Adshead <gordon@adshead.com> [+Z] Beaumont House, 2 Goodrington Road, Handforth, Cheshire, SK9 3AT, UK [+Z] Tel:+44-1625-549770 Mob:+44-7776-145602

At 67 markers, I have several 13th cousins, once removed/14th cousins that have 67/67 matches. This drops to 110/111 for three and 111/111 with 111 markers. Jim On Thu, May 4, 2017 at 11:50 AM, Gordon Adshead <gordon@adshead.com> wrote: > I have a question please about likely DNA mutation rates > > So far, I have only managed to Y-37 test 18x ADSHEADs each in different > Trees > These form two quite separate genetic groups plus 3x odd-balls. > In one group of 6x Manchester based trees:- > 2 are identical at 37 markers and the other 4 all differ by one marker, > but each at a different site. > > The two with the same signature at Y-37 have just up-graded the test to > Y-67 > and they remain completely identical at all 67 markers. > This tends to confirm that the two documented heads of these trees > <David bap.Manchester Cathedral 1750 : Father John> and > <Nathaniel bap.Manchester Cathedral 1752: Father John> > are in fact brothers. > > My issue is that the two persons tested are each 7 generations down from > their presumed common ancestor John > ie There are 14 births involved with apparently no mutations. > > Can anybody give me some idea please > Is this a common or rare situation ? > > Or better still could you point me at some sort of quantification of the > known mutation rates of each of the 67 markers > So I can work out the probability of No mutations in 14 births. > > Many thanks > Gordon > > > [+Z] Gordon Adshead <gordon@adshead.com> > [+Z] Beaumont House, 2 Goodrington Road, Handforth, Cheshire, SK9 3AT, > UK > [+Z] Tel:+44-1625-549770 Mob:+44-7776-145602 > > > > _____________________________________________ > > Information and admin page: > http://one-name.org/guild-information-administration/ > ------------------------------- > To unsubscribe from the list, please send an email to > GOONS-request@rootsweb.com with the word 'unsubscribe' without the quotes > in the subject and the body of the message > -- Jim James M. Owston, EdD Owston One-Name Study #5647 owston@one-name.org http://www.one-name.org/cgi-bin/search.cgi?find=5647

In our VICK Y-DNA Surname Project we have a man (A) who at 37 STRs has no differences with another man (B). "A" shares a 7th great paternal grandfather with 34 other men in the project who have had the 37 STRs tested. None of those other men have zero STR differences with "A." Those other 34 have from one to four differences with "A." "A" and three of the 34 men have had the Big Y test at FTDNA. "A" and the other three are haplogroup Q-FGC6995. Each of the four descends from a different son of their 7th great grandfather. "B" has also had the Big Y test and is ancestral (negative) for both SNPs that define haplogroup Q-FGC6995. "B" is haplogroup Q-FGC6866. Sometimes being a perfect match at 37 STRs doesn't tell the whole story nor does having up to four differences. I have learned to put a lot more emphasis on SNPs since "B" joined our project. Regards, Larry 4679 ________________________________ From: Gordon Adshead <gordon@adshead.com> To: GOONS <goons@rootsweb.com> Sent: Thursday, May 4, 2017 1:05 PM Subject: [G] Y-DNA Mutation Rates I have a question please about likely DNA mutation rates So far, I have only managed to Y-37 test 18x ADSHEADs each in different Trees These form two quite separate genetic groups plus 3x odd-balls. In one group of 6x Manchester based trees:- 2 are identical at 37 markers and the other 4 all differ by one marker, but each at a different site. The two with the same signature at Y-37 have just up-graded the test to Y-67 and they remain completely identical at all 67 markers. This tends to confirm that the two documented heads of these trees <David bap.Manchester Cathedral 1750 : Father John> and <Nathaniel bap.Manchester Cathedral 1752: Father John> are in fact brothers. My issue is that the two persons tested are each 7 generations down from their presumed common ancestor John ie There are 14 births involved with apparently no mutations. Can anybody give me some idea please Is this a common or rare situation ? Or better still could you point me at some sort of quantification of the known mutation rates of each of the 67 markers So I can work out the probability of No mutations in 14 births. Many thanks Gordon [+Z] Gordon Adshead <gordon@adshead.com> [+Z] Beaumont House, 2 Goodrington Road, Handforth, Cheshire, SK9 3AT, UK [+Z] Tel:+44-1625-549770 Mob:+44-7776-145602 _____________________________________________ Information and admin page: http://one-name.org/guild-information-administration/ ------------------------------- To unsubscribe from the list, please send an email to GOONS-request@rootsweb.com with the word 'unsubscribe' without the quotes in the subject and the body of the message