On most documentation I am the third cousin once removed of Greg, ie my great great great grandparents on one line of ancestry are Greg's great great grandparents on one line.
This is supported by the fact that we share 40 centimorgans with a longest block of 12.
However, there are some sources that indicate that we may not have had a common male ancestor, ie that my great great great grandfather was a different person from Greg's great great grandfather.
Could the fact that Greg and I share 40 centimorgans be consistent with having only one common ancestor (the female) rather than two?
I would be grateful for any comments on this matter.
This is supported by the fact that we share 40 centimorgans with a longest block of 12.
However, there are some sources that indicate that we may not have had a common male ancestor, ie that my great great great grandfather was a different person from Greg's great great grandfather.
Could the fact that Greg and I share 40 centimorgans be consistent with having only one common ancestor (the female) rather than two?
I would be grateful for any comments on this matter.
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