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I have just begun using Family Finder, after 40 years of extensive conventional genealogy research.
Years ago, my y-DNA test confirmed a match with a male known by genealogical research to be a third cousin descended from my paternal great-great-grandfather (Samuel Paris McKinney).
Now, Family Finder shows good overall matches with two people who can be shown through genealogical research to share that same paternal great-great-grandfather (Samuel Paris McKinney), but there is only one 6 cM common chromosome region among the 3 of us until you look at the 1 cM+ range, which adds two 2cM regions.
I had expected a larger overlap. What’s happening?
Years ago, my y-DNA test confirmed a match with a male known by genealogical research to be a third cousin descended from my paternal great-great-grandfather (Samuel Paris McKinney).
Now, Family Finder shows good overall matches with two people who can be shown through genealogical research to share that same paternal great-great-grandfather (Samuel Paris McKinney), but there is only one 6 cM common chromosome region among the 3 of us until you look at the 1 cM+ range, which adds two 2cM regions.
I had expected a larger overlap. What’s happening?
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