Andreas, 23andMe doesn't use filters, so we see many Matches there that the 3 DTCs didn't post. In my experience some of them are IBD and Triangulate, but many don't (and go into my IBS bin) Jim Bartlett On 11/09/15, Andreas West via<genealogy-dna@rootsweb.com> wrote: Thanks Tim, the probabilities are known to me and they are exactly that, probabilities. As Jim pointed out, there is no 100% guarantee. As for small segments (less than 7cM or less than 700 SNP) the probabilities posted are misleading as we only see what the DTC's already filtered out with their algorithms. So for 23andme for example those shown to me have a very high chance to triangulate into a group, for sure over 50%. The stats shown for the same 5cM segment give the real probability based on looking at all matches but like I said the DTC's filter out the rubbish (and some good ones) already on their side before presenting us the best matches. Andreas > On 9 Nov 2015, at 14:06, Tim Janzen via <[1]genealogy-dna@rootsweb.com> wrote: > > Dear Andreas, > The answer to your question depends on a number of variables. The longer > the HIR in CoA that people are triangulating on the higher the probability > that you truly share DNA with the other people in question. This really > boils down to the IBS/IBD statistics that we have discussed on this list a > number of times previously. As a general rule HIRs over 15 cMs and > containing at least 2000 SNPs will be IBD and so any group of people who > triangulate on an HIR with these criteria will truly share the DNA segment > in question. When people are triangulating on fairly short HIRs such as > those with only 5 cMs and 500 SNPs then there is a strong possibility that > some of the people in the triangulated group won't actually share DNA with > each other, particularly if the group only has 3 or 4 people in it. When in > doubt try to use phased data in GEDmatch for the comparisons if that is > feasible. > Sincerely, > Tim Janzen > > -----Original Message----- > From: g[2]enealogy-dna-bounces@rootsweb.com > [[3]mailto:genealogy-dna-bounces@rootsweb.com] On Behalf Of Andreas West via > Sent: Sunday, November 8, 2015 8:10 PM > To: [4]jlerch1@lighttube.net > Cc: [5]genealogy-dna@rootsweb.com > Subject: Re: [DNA] value of the present Countries of Ancestry > > > Is it 100% verified that you triangulate with a CoA match if you and another > person (so all three of you) match on that same segment? > > Andreas > > > > ------------------------------- > To unsubscribe from the list, please send an email to G[6]ENEALOGY-DNA-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 G[7]ENEALOGY-DNA-request@rootsweb.com with the word 'unsubscribe' without the quotes in the subject and the body of the message References 1. mailto:genealogy-dna@rootsweb.com 2. mailto:enealogy-dna-bounces@rootsweb.com 3. mailto:genealogy-dna-bounces@rootsweb.com 4. mailto:jlerch1@lighttube.net 5. mailto:genealogy-dna@rootsweb.com 6. mailto:ENEALOGY-DNA-request@rootsweb.com 7. mailto:ENEALOGY-DNA-request@rootsweb.com

I meant to say GEDmatch doesn't use filters. I'm not aware of any filters by 23andMe. Jim - www.segmentology.org > On Nov 9, 2015, at 10:42 AM, Jim Bartlett via <genealogy-dna@rootsweb.com> wrote: > > > Andreas, > 23andMe doesn't use filters, so we see many Matches there that the 3 DTCs > didn't post. In my experience some of them are IBD and Triangulate, but many > don't (and go into my IBS bin) > > > > Jim Bartlett > > On 11/09/15, Andreas West via<genealogy-dna@rootsweb.com> wrote: > > Thanks Tim, the probabilities are known to me and they are exactly that, > probabilities. As Jim pointed out, there is no 100% guarantee. > As for small segments (less than 7cM or less than 700 SNP) the probabilities > posted are misleading as we only see what the DTC's already filtered out > with their algorithms. So for 23andme for example those shown to me have a > very high chance to triangulate into a group, for sure over 50%. The stats > shown for the same 5cM segment give the real probability based on looking at > all matches but like I said the DTC's filter out the rubbish (and some good > ones) already on their side before presenting us the best matches. > Andreas >> On 9 Nov 2015, at 14:06, Tim Janzen via <[1]genealogy-dna@rootsweb.com> > wrote: >> >> Dear Andreas, >> The answer to your question depends on a number of variables. The longer >> the HIR in CoA that people are triangulating on the higher the probability >> that you truly share DNA with the other people in question. This really >> boils down to the IBS/IBD statistics that we have discussed on this list a >> number of times previously. As a general rule HIRs over 15 cMs and >> containing at least 2000 SNPs will be IBD and so any group of people who >> triangulate on an HIR with these criteria will truly share the DNA segment >> in question. When people are triangulating on fairly short HIRs such as >> those with only 5 cMs and 500 SNPs then there is a strong possibility that >> some of the people in the triangulated group won't actually share DNA with >> each other, particularly if the group only has 3 or 4 people in it. When > in >> doubt try to use phased data in GEDmatch for the comparisons if that is >> feasible. >> Sincerely, >> Tim Janzen >> >> -----Original Message----- >> From: g[2]enealogy-dna-bounces@rootsweb.com >> [[3]mailto:genealogy-dna-bounces@rootsweb.com] On Behalf Of Andreas West > via >> Sent: Sunday, November 8, 2015 8:10 PM >> To: [4]jlerch1@lighttube.net >> Cc: [5]genealogy-dna@rootsweb.com >> Subject: Re: [DNA] value of the present Countries of Ancestry >> >> >> Is it 100% verified that you triangulate with a CoA match if you and > another >> person (so all three of you) match on that same segment? >> >> Andreas >> >> >> >> ------------------------------- >> To unsubscribe from the list, please send an email to > G[6]ENEALOGY-DNA-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 > G[7]ENEALOGY-DNA-request@rootsweb.com with the word 'unsubscribe' without > the quotes in the subject and the body of the message > > References > > 1. mailto:genealogy-dna@rootsweb.com > 2. mailto:enealogy-dna-bounces@rootsweb.com > 3. mailto:genealogy-dna-bounces@rootsweb.com > 4. mailto:jlerch1@lighttube.net > 5. mailto:genealogy-dna@rootsweb.com > 6. mailto:ENEALOGY-DNA-request@rootsweb.com > 7. mailto:ENEALOGY-DNA-request@rootsweb.com > > ------------------------------- > To unsubscribe from the list, please send an email to GENEALOGY-DNA-request@rootsweb.com with the word 'unsubscribe' without the quotes in the subject and the body of the message