Southern California Genealogical Society

DNA Interest Group
ONLINE ONLY from 10 am -12 pm

Meets: Quarterly on the 5th Saturday of most months (check calendar)
Location: 417 Irving Drive, Burbank, CA 91504
Southern California Genealogy Society building

DNA Interest Group Meeting - ONLINE ONLY
DNA Interest Group Meeting - 10:00 a.m. - 12:00 p.m.
Saturday, October 29, 2022
download flyer
To register for this SPECIAL webinar meeting and pay the $5.50 fee, go to:

"Understanding the X Chromosome in Genetic Genealogy"

The X chromosome has a unique inheritance pattern. It should not be confused with the mitochondrial DNA which is only passed down from maternal ancestors. This presentation will explain in layman's terms both the scientific basis of the X chromosome inheritance patterns and its practical use for genealogists. Adoptees will want to find out why it is such an important chromosome and how it differs from the other chromosomes. It is particularly useful for half-sisters looking for their biological father in common. Learn how to identify an X match in a direct-to-consumer online DNA browser. Even if your chosen test company does not provide X matches, you may still be able to upload your DNA to a third party site such as GEDmatch and make new discoveries. Success stories and practical uses will be presented. This discussion will be most beneficial if you have already tested your DNA for genealogy purposes and have at least an intermediate understanding of the match process.

Presenter: Kathryn Johnston M.D. has been actively studying genetic genealogy since 2004. She wrote the chapter, "X-DNA Techniques and Limitations" for the book, Advanced Genetic Genealogy: Techniques and Case Studies. Editor Debbie Parker Wayne, Wayne Research, Cushing Texas. 2019.

  • 10:00-10:10 Announcements & Introductions
  • 10:10-11:30 Presentation
  • 11:30-12:00 Questions and Answerw

    For more info, contact Bonny Cook, Alice Fairhurst, Megan Lee and Kathy Johnston at

    Future Meetings in 2022:
    To be held quarterly on the 5th Saturday of the month from 10:00 - 12:00.
    July 30, 2022, October 29, 2022.

    SCGS sponsors two projects through Family Tree DNA. Call 713-868-1438 or order online at:
    " SCGS project for ANY SURNAME,
    " French Heritage project,


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The DNA Interest Group was formed in 2005 and held its first meeting in conjunction with the International Society of Genetic Genealogy (ISOGG) in July 2005.

The group focus is to provide education to assist genealogists to understand the DNA test processes and interpret their test results.

Since 2005 there have been many changes in the types of DNA test services, the number of DNA test companies for genealogical purposes and evolving databases and tools for analytical purposes. Project administrators coordinate across the various facets of genetic genealogy to help lead the DNA Interest Group members into the future.

To order a DNA kit from Family Tree go to

FTDNA offers Normal Reduced Prices for SCGS DNA Project for ANY SURNAME:

SCGS sponsors two DNA projects through Family Tree DNA:

  • SCGS DNA Project for ANY SURNAME,
  • and the French Heritage Project

    To order, call Family Tree DNA at 713-868.1438 and ask to join the SCGS project or follow this link to order online.