This three-part course introduces genealogists to the practical use of DNA segments in family history research. Moving beyond match lists and shared cM amounts, the course explores how segment analysis, chromosome mapping, triangulation, and DNA Painter can help solve more complex research questions.

Topics include endogamy, shared ancestral communities, multiple possible relationships, overlapping ancestral lines, and cases where traditional shared-match analysis alone is inconclusive.

Alongside practical research applications, the course will also explore chromosome mapping and “DNA painting” as a way to better understand DNA inheritance and visually map ancestral contributions across the genome.

Using a real-life case study in which segment analysis is being used to disentangle several possible ancestral connections, participants will learn how segments can help isolate ancestral lines and test genealogical hypotheses.

Designed as a practical, step-by-step introduction rather than a highly technical deep dive, the course focuses not only on how to work with segments, but also when segment analysis is genuinely useful in genetic genealogy research.

No prior experience with segment analysis is assumed and attendees do not need to have complex or endogamous DNA cases to benefit from the course.

Week 1 — Understanding DNA Segments

Week 2 — Chromosome Mapping and Identifying Ancestral Segments

Week 3 — Triangulation, GEDmatch, and Putting It All Together

About the Presenter

Donna Rutherford is a London-based genetic genealogist originally from New Zealand. She specialises in helping genealogists use DNA to solve family history questions and regularly presents talks and courses on genetic genealogy, DNA analysis, and emerging research tools. Donna is known for her practical, accessible teaching style and her ability to make complex DNA concepts understandable for genealogists of all levels.