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Ancestral Family Tree DNA Testing / Unexpected number of cMs of DNA matches
« on: Thursday 28 December 23 17:09 GMT (UK) »
My daughter and I have both done the Ancestry DNA test. Needless to say we share many DNA matches, but what is unexpected is that the number of cM for those matches is often more for my daughter than for me. I would have expected (maybe naively) that the number of cMs matched would be either the same as for me, or less. The result has been that where I have sorted the matches into groups on the basis of their shared matches, it is sometimes the case that there are several members of the group that have shown up on her list but not on mine as presumably they are below the 8cM limit for me.
Is this just down to random errors? Does anyone know what the error bar is on DNA matches? Is this a common state of affairs? Or is my test somehow flawed?
Is this just down to random errors? Does anyone know what the error bar is on DNA matches? Is this a common state of affairs? Or is my test somehow flawed?