“Using Tree Information Provided by DNA Testing Companies” – by Glenn York

October 5, 2021 @ 7:00 pm – 8:30 pm

Members may register with the link provided in the BGS newsletter.  Register here for the meeting: https://us02web.zoom.us/meeting/register/tZIucOqsqTkoGtVV3-joGtDtXLTLsKdUDZ7W.  The Zoom link will be sent in the registration confirmation email.


In this presentation, we will look at the three different approaches DNA testing companies use to find family relationships, exploring Ancestry “Thru-lines”, MyHeritage “Theories of Family Relativity”, and 23andMe “Your Family Tree.” We will briefly look at some third-party tools that help build tree information from DNA test results and discuss how each can be useful to advance your research.


Glenn York is an avid genealogist with decades of research experience at numerous facilities across the United States. An early user of technology in genealogy, Glenn used computer bulletin board systems to communicate with other genealogists in the 1980s, and began researching by pouring over microfilm at the National Archives and reading books at the Library of Congress while living in the Washington DC area.

Over the years, Glenn has gained extensive experience in genetic genealogy, and works with all major DNA testing companies. He was first tested in 2005, and he currently manages DNA tests for over 30 family members.

Glenn’s formal education includes a bachelor’s degree in Social Science and a master’s degree in Telecommunications. He has completed eight courses of the Salt Lake Institute of Genealogy (SLIG) and Genealogical Research Institute of Pittsburg (GRIP) and has participated in many genealogy conferences and seminars.

Glenn currently serves as President of the Larimer County Genealogical Society and is the Colorado Council of Genealogical Societies’ delegate to the National Genealogical Society. He is a member of the Association of Professional Genealogists, National Genealogical Society, and many other genealogical and historical societies.

Glenn facilitates monthly DNA study groups for two area genealogical societies, teaches genealogy classes, and volunteers at a local library to help people with genealogy research. Glenn has assisted many in discovering their biological families through his understanding of genetic genealogy.