Foundations in DNA 4 of 5: Using Shared Matching

In this engaging and information-rich genealogy webinar, renowned DNA expert Blaine Bettinger leads viewers through an in-depth exploration of shared matching, a powerful tool offered by all major DNA testing companies. This presentation—part of the Foundations in DNA series—reveals how shared matching can help genealogists identify relationships, form genetic clusters, and break down long-standing brick walls in their family history research. With clarity and enthusiasm, Bettinger explains both the technical nuances and strategic applications of shared matching, making the session essential for anyone seeking to leverage DNA in their genealogical toolkit.

Key Takeaways from the Webinar

• Shared Matching Is a Foundational Tool
  Shared matching—where two people share a third match in common—enables genealogists to identify genetic networks that often reflect shared ancestry. Bettinger describes it as the most powerful feature offered by testing companies and explains how even a small piece of extra information—knowing that two matches are also related to each other—can lead to significant discoveries.

• Testing Company Differences Matter
  The presentation walks through how shared matching is implemented at AncestryDNA, MyHeritage, FamilyTreeDNA, and 23andMe, highlighting crucial differences. For example, Ancestry’s 20 cM threshold can obscure shared matches unless the Pro Tools feature is used. Understanding these distinctions is key to maximizing each platform's potential.

• Strategic Match Comparison Can Break Brick Walls
  Blaine offers a compelling case study involving an adopted great-grandmother, demonstrating how shared matching and tree-building were used to uncover her biological family. By comparing shared matches between carefully selected relatives and eliminating known ancestral lines, he isolated unknown clusters that ultimately revealed the mystery ancestor’s identity.

Ready to Dive Deeper?
View the full webinar to see Blaine Bettinger’s visual breakdowns, real-time platform demonstrations, and detailed case study unfold step by step. Whether you’re new to DNA or looking to refine your advanced analysis, this session will enhance your understanding and practical skills.

Be sure to explore the five-page syllabus included with the webinar. It offers additional insights, visual aids, and references to deepen your mastery of shared matching strategies.