One Chromosome, Two Sides, No Zipper – ICW and the Matrix

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DNAeXplained - Genetic Genealogy

ZipperThe questions I’ve received most often since the release of the new Family Finder Matrix from Family Tree DNA has to do with matches.  Specifically, what the “In Common With” feature is telling you versus what the Family Finder “Matrix” is telling you and how to utilize all of this information together.  At the bottom of this confusion is often a fundamental lack of understanding of how matching occurs and what it means in different contexts.

Let’s talk about this, step by step.

The “in common with” function (called triangulation for a few weeks, but now labeled “run common matches” ) shows you every person that you and one of your matches, match with in common.  I’ll be running this option for my matches with cousin David, shown below.

zipper 1

Here’s an example of my matches in common with my cousin, David.

Zipper 2

The Family Finder Matrix takes this information a…

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