I have recently received the results for my family finder. What within a range of relationships does second to fourth cousins actually mean ; is it the same as if I had a second cousin ie my cousins children for a second cousin etc?
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family finder and second to fourth cousins
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What 2nd to 4th cousin means to FTDNA is that the amount of matching DNA falls within a range that someone once estimated is appropriate for a 2nd to 4th cousin. However, in my experience, this label is often wildly optimistic, the actual relationship appears to be at least a couple generations farther back, or even more remote than that! When the amount of matching DNA is on the order of 100 cM or more, that's something to get excited about. When it's on the order of 50 cM or less, compare pedigrees if you can, but don't expect to find the connection in every case. Most of mine remain unexplained.
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With the genomes in my family that I manage, the cousin estimates vary greatly. For me personally, the estimates of 1st-2nd and 2nd-3rd were right in the middle. Another family member has a very endogamous tree and the estimates were 3-4 generations further back (but we were successful in finding MRCAs). As others have said - it all depends. I have noticed from my experience only (and I won't extrapolate to others), larger and fewer segments had a bigger impact on predictability with the cousin guesstimate provided.
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