Think of DNA triangulation as points on a triangle. Meaning a specific location with similar start and endpoints on that same chromosome. You actually have to share DNA all on the same segment on a specific chromosome. In genetic genealogy, triangulation mirrors the process used by surveyors, who employ multiple triangles to help deduce the exact landscape of a particular area.Three or more persons who are matching share DNA is not enough. Triangulation is a broad term with application in many fields, from psychology to politics. Just matching two people is not enough.Triangulation is a strategy genealogists can use to determine how genetic matches are related. This indicates that all three inherited that portion of DNA from a common ancestor. Triangulation is a genetic genealogy process where three people (or more) are matched to each other at the same segment location. When you look at your shared matches at MyHeritage, this icon to the right of the match tells you there is at least one.
Gedmatch Triangulation for Dad cut and pasted to a spreadsheet then sorted by chromosome and start.
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How to use triangulation to confirm DNA relatives. For larger Triangulation groups, DNA Treebuilding can be attempted if there is a significant amount of shared DNA between people.Open an excel spreadsheet, enter the DNA match names for 2 nd-3 rd cousin. Some matches may have GEDmatch files or you may be able to find family trees on their parent database (Ancestry, 23andMe, Family Tree DNA).
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