The 6cm match that doesn't match either of her parents sounds random to me (it isn't necessarily two tiny matching segments combining but could zigzag across her parents' DNA), but since both of you have ancestry from the small endogamous Cornish parish, then it might not matter whether you truly share DNA, you might be related anyway. Karla Huebner calypsospots AT gmail.com On Thu, Dec 7, 2017 at 12:24 PM, Brooks Family <[email protected]> wrote: > I have a match on AncestryDNA. AncestryDNA reports that it is a 6cM > match. The match contacted me, and reported that although I don't match > either of her parents, the small segment "... means that both of them are > matched to you and together their DNA adds up to a match to me but is not > enough for them separately" > > It is true that we both have ancestry from a small parish in Cornwall that > intermarried for at least a century or two. I didn't spot an obvious > connection on our trees, but I didn't inspect closely. > > I've suggested to my match that this segment is a false positive; she is > reluctant to give up her idea. I've provided two links about false > positives. > > Anyone have thoughts about this? Either direction. > > Thanks! > > > ------------------------------- > To unsubscribe from the list, please send an email to > [email protected] with the word 'unsubscribe' without > the quotes in the subject and the body of the message
AncestryDNA uses an algorithm, Timber, that edits the matching DNA segments, culling those matching pieces of DNA that, based on set criteria, seem to be something other than an indication of recent shared ancestry. Designed to reduce false positives and increase the accuracy of the relationship predictions, Timber - from my observations - has had the opposite effect (increasing the number of false negatives and reducing the accuracy of the relationship predictions) in too many cases. I recommend comparing your DNA, your match's DNA, and that of both her parents, on GEDMatch.com at the default matching threshold on that site. Let us know what you find. Very Respectfully, Shannon On Thu, Dec 7, 2017 at 1:10 PM, Karla Huebner <[email protected]> wrote: > The 6cm match that doesn't match either of her parents sounds random to me > (it isn't necessarily two tiny matching segments combining but could zigzag > across her parents' DNA), but since both of you have ancestry from the > small endogamous Cornish parish, then it might not matter whether you truly > share DNA, you might be related anyway. > > Karla Huebner > calypsospots AT gmail.com > > On Thu, Dec 7, 2017 at 12:24 PM, Brooks Family <[email protected]> > wrote: > > > I have a match on AncestryDNA. AncestryDNA reports that it is a 6cM > > match. The match contacted me, and reported that although I don't match > > either of her parents, the small segment "... means that both of them are > > matched to you and together their DNA adds up to a match to me but is not > > enough for them separately" > > > > It is true that we both have ancestry from a small parish in Cornwall > that > > intermarried for at least a century or two. I didn't spot an obvious > > connection on our trees, but I didn't inspect closely. > > > > I've suggested to my match that this segment is a false positive; she is > > reluctant to give up her idea. I've provided two links about false > > positives. > > > > Anyone have thoughts about this? Either direction. > > > > Thanks! > > > > > > ------------------------------- > > To unsubscribe from the list, please send an email to > > [email protected] 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 > [email protected] with the word 'unsubscribe' without > the quotes in the subject and the body of the message > -- Mr. Shannon S. Christmas Chief Market Advisor | Design Strategist The Christmas Collective <http://christmascollective.wix.com/the-christmas-collective> Strategic Real Estate and Land Use Solutions New York, NY | Washington, DC P: 212.433.0586 | 202.618.1687 F: 1.888.788.5984 http://www.linkedin.com/in/shannonchristmas/