Hello all, I have observed a pattern for sometime now with AncestryDNA matches. I will find a common ancestor with an AncestryDNA match and invite the match to upload their raw DNA data to GEDmatch.com. After the match has uploaded their raw data, they provide me with their kit number so that I can compare their data to mine on GEDmatch. GEDmatch reports that there are no matching DNA segments, even at the 1 cM threshold. Can someone explain why two individuals matched at AncestryDNA would not share even a single 1 cM segment on GEDmatch? Very Respectfully, Shannon -- Mr. Shannon S. Christmas Chief Market Advisor | Design Strategist The Christmas Collective <http://thechristmascollective.com/> Strategic Real Estate and Land Use Solutions New York, NY | Washington, DC P: 212.433.0586 | 202.618.1687 F: 1.888.788.5984 shannon.christmas@thechristmascollective.com http://www.linkedin.com/in/shannonchristmas/

Shannon, It's because Ancestry's threshold for a match is 5Mbp. There are areas where a 5Mbp segment doesn't have 1cM. Jim - Sent from my iPhone - FaceTime! On Dec 3, 2013, at 8:04 PM, Shannon Christmas <shannon.s.christmas@gmail.com> wrote: > Hello all, > I have observed a pattern for sometime now with AncestryDNA matches. I will > find a common ancestor with an AncestryDNA match and invite the match to > upload their raw DNA data to GEDmatch.com. After the match has uploaded > their raw data, they provide me with their kit number so that I can compare > their data to mine on GEDmatch. GEDmatch reports that there are no matching > DNA segments, even at the 1 cM threshold. > > Can someone explain why two individuals matched at AncestryDNA would not > share even a single 1 cM segment on GEDmatch? > > Very Respectfully, > Shannon > -- > Mr. Shannon S. Christmas

Hi Jim, Knowing that the correlation between cM and Mbps is minimal, that was my first thought. What can anyone learn from from these kinds of matches if you cannot perform chromosome mapping? Very Respectfully, Shannon On Tue, Dec 3, 2013 at 8:30 PM, Jim Bartlett <jim4bartletts@verizon.net>wrote: > Shannon, > > It's because Ancestry's threshold for a match is 5Mbp. There are areas > where a 5Mbp segment doesn't have 1cM. > > Jim - Sent from my iPhone - FaceTime! > > On Dec 3, 2013, at 8:04 PM, Shannon Christmas < > shannon.s.christmas@gmail.com> wrote: > > > Hello all, > > I have observed a pattern for sometime now with AncestryDNA matches. I > will > > find a common ancestor with an AncestryDNA match and invite the match to > > upload their raw DNA data to GEDmatch.com. After the match has uploaded > > their raw data, they provide me with their kit number so that I can > compare > > their data to mine on GEDmatch. GEDmatch reports that there are no > matching > > DNA segments, even at the 1 cM threshold. > > > > Can someone explain why two individuals matched at AncestryDNA would not > > share even a single 1 cM segment on GEDmatch? > > > > Very Respectfully, > > Shannon > > -- > > Mr. Shannon S. Christmas > > > > ______________________________ > For answers to Frequently Asked Questions about mailing lists, please see: > http://dgmweb.net/MailingListFAQs.html > > > ------------------------------- > To unsubscribe from the list, please send an email to > AUTOSOMAL-DNA-request@rootsweb.com 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://thechristmascollective.com/> Strategic Real Estate and Land Use Solutions New York, NY | Washington, DC P: 212.433.0586 | 202.618.1687 F: 1.888.788.5984 shannon.christmas@thechristmascollective.com http://www.linkedin.com/in/shannonchristmas/