Single DNA segment - 28cM: Passed Unchanged Since 1600's.

[LindaT]

Is it possible you are getting a double dose of the common ancestor's DNA because of subsequent cousin marriages?

I've got a situation like that where a predicted 4th cousin is actually a 7th. It's possible I haven't found a more recent common ancestor who is responsible for my 24cm block but I do know I"m getting DNA from the known common ancestor from two different paths.

[ursus]

Highly unlikely. Much greater chance that you have a common ancestor that's not showing up on your paper trail.

Agreed.

[JOlson]

Highly unlikely. Much greater chance that you have a common ancestor that's not showing up on your paper trail.

[shandy4473]

Good Day Everyone,

I would like to request some input. I have a match which we will call David A. Via 23andMe - David A and I share a single DNA segment of 28cMs. This DNA segment resides on chromosome 3. It turns out that via investigation performed by myself, our last common ancestors are Richard Goode (1600-1650) and Wife Whitley 1590.

Would one agree that a single DNA segment of 28cM can pass unchanged (via recombination) since the 1600's to present day descendants?

Thanks
Steve