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Author Topic: Ancestry Managment.  (Read 2715 times)

Offline Biggles50

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Re: Ancestry Managment.
« Reply #9 on: Sunday 14 September 25 10:23 BST (UK) »
That is a fantastic position to be in.

The 2000cM does look like a half sibling and that would be a good initial presumption to make.

It is in the same ball park as the amount of DNA that I share with my Half Sister who I found last year, for us we did not really need her to take a test as we look so much alike and when she showed me a photo of her Father (who her shared DNA with me proved that he was also my biological Father) it was like looking at a photo of me when I was fifty.

Unlike documentation, citations etc which whilst being helpful they can be in error, DNA does not lie with levels of shared DNA above the false positives area.

Good luck with the research.

Offline Steve3180

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Re: Ancestry Managment.
« Reply #10 on: Sunday 14 September 25 20:48 BST (UK) »
Just to add that when you're looking at relationships this close the number of segments you share is also relevant.
A maternal half sibling will share about 50 segments whereas a paternal will share about 32. The dividing line between them is at about 40 segments with a small overlap.
This gets less useful as you get out past grandparents as the overlaps get much bigger but is worth bearing in mind when trying to place close relatives.
 

Offline nestagj

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Re: Ancestry Managment.
« Reply #11 on: Tuesday 23 September 25 17:37 BST (UK) »
How exciting - when I was very new to DNA a cousin asked my other half and his mother to get their DNA tested as she was trying to trace her father (they were related to her Mum and so we were using the exclusion method to find matches).   About 2 years later I got a message out of the blue from Ancestry - a half sister to his Mum had appeared; no-one knew.   This lady's son knew a lot about the adoption of his mother and we were able to work out when it had happened, etc which was whilst he (my MIL's Dad) was married to his first wife.   Again, there wasn't much need for DNA this gentleman (the son) was very like his grandfather and also to the original cousin who had asked us to test originally.

So we had

Firstly the lady who asked us to test (in bold)

Grandad's brother + wife = MIL's cousin = daughter adopted out (full 1C1R to my husband) who also had a likeness to her great uncle (Grandad)

Grandad + Second Wife = My mother in Law = my husband

then

Grandad + Another Woman = half sister to MIL = son (half 1C to my husband) (great likeness to Grandad)

and the lady who brought it all about

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