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