First, make sure he's in a project of some sort to see ALL his matches at 12 markers. I learned this little nuance earlier this year, that only exact matches show at 12 markers unless they are in a project (join Project Pending if their isn't a suitable surname) https://www.familytreedna.com/group-join.aspx?Group=Project_Pending Next it would probably depend on the haplogroup whether it makes sense to add additional markers. Good luck~ Mary E Hall Santa Barbara, CA On Wed, Nov 25, 2015 at 2:18 PM, Karla Huebner via < genealogy-dna@rootsweb.com> wrote: > A member of our local DNA interest group has tested her brother at what > sounds like 12 markers. He has no matches. She wonders whether adding > markers would up his chances of getting a match. > > I said that my understanding was that usually it would not, but that if the > non-matching markers were concentrated in the 12, conceivably a 25 or 37 > marker upgrade might produce a match. > > Let me know if I have misrepresented anything there so that if necessary I > can correct what I told her--I am not that experienced with Y so I am > tentative about advising people on it. > > -- > Karla Huebner > calypsospots AT gmail.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 >