10/22/2026
Please join our ADVANCED DNA GROUP: Our next online meeting is Oct 24 from 9a.m. (PT).
Register here: http://gfo.org/learn/special-interest-groups/dna.html
We meet the 3rd Saturday in Jan, Apr, Jul. & Oct. Genetic Genealogy is the use of DNA testing to aid traditional genealogical research. It does not replace research but helps prove or disprove its accuracy. Please join us. It’s free and open to the public.
Jim Bartlett will be giving a presentation entitled “Segmentology and Common Ancestor Spreadsheet.”
A brief overview of "Segmentology Fundamentals" (Segments; Groups; Tools) and then a deeper dive into the Common Ancestor Spreadsheet, a great tool. Record your known cousin Matches with Common Ancestors with their path back to the CA. Add columns of interest to you: company, cousinship, clusters, URL to them & Trees, segments, interrelationships, false/iffy lines, etc. Captures a key data set - offline; search and sort; easy data analysis: your (curated) "Shared cM Project"; ProTools aide; etc.
Jim Bartlett has been a genealogist since 1974. Into DNA in 2002 when he started the BARTLETT surname Y-DNA project at FTDNA. Tested at every major company. Hosts an Advanced DNA SIG in MD. Triangulated over 20,000 segments into 372 Groups; documented over 10,000 Matches with CAs in a Spreadsheet Tool. Still blogs at www.Segmentology.org => now a free ebook at https://isogg.org/wiki/Segmentology_Fundamentals Determined to continue to push the GenGen envelope - think genealogy analysis tools; atDNA haplogroups; family insights; non-traditional genetic links (Myers-Briggs; Prosopagnosia); etc..
If you're not on the mailing list, send a message to [email protected].
http://gfo.org/learn/special-interest-groups/dna.html
Learn how to make sense of DNA tests for genealogy with the GFO's Beginner and Advanced DNA groups.