I have just discovered that my maternal grandfather was not my mother's biological father. My mother's DNA matches have been baffling me for a while and this new piece of information will explain some of the mysteries. I now have the task of trying to work out who her biological father may have been. I have a match of 115cM that could potentially be on her father's side. Does anyone know how far back the common ancestor is likely to be? I appreciate this is not an exact science.
Thanks in anticipation.
Thanks in anticipation.