Some are under 5cm. I don't know whether smaller segments are common among European ancestors except perhaps those I found on the x chromosome which we appeared to share with dozens of other people who seemed to be related on more that one line. No answer yet to the first triangulation match I notified. So far I've done better taking a genealogical approach based on the nature of the match, matches in common, and surname lists. Lindsey -----Original Message----- From: Andreas West <ahnen@awest.de> To: Lindsey Britton <lplantagenet@aol.com>; genealogy-dna <genealogy-dna@rootsweb.com> Sent: Wed, Dec 2, 2015 10:41 pm Subject: Re: [DNA] Small segment matches when the common ancestors are known Not too much but you still have to set reasonable minimum criteria in SNP and genetic distance. Otherwise the same rules of triangulation apply, just be aware that there are very small segments like the Western Haplogroup Ancestral Segment on CHR 2 that everyone with European background seems to have. Andreas > On 3 Dec 2015, at 05:31, Lindsey Britton via <genealogy-dna@rootsweb.com> wrote: > > > Is the approach different for segments less than 7cm when the relationship (for example 4th cousin once removed or 5th cousin once removed) and common ancestors are already known? > > Lindsey > > > ------------------------------- > 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