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General => Ancestral Family Tree DNA Testing => Topic started by: eial on Sunday 26 March 23 08:09 BST (UK)

Title: DNA 12% match
Post by: eial on Sunday 26 March 23 08:09 BST (UK)

I did a DNA test hoping to find contacts for my birth father’s family.   I now have a 12% match with a young man.     Does this make him my half-nephew, i.e. that his mother and I are half-sisters?      My half-sister on my mother’s side gave a 25% match.   Any help would be appreciated.

Title: Re: DNA 12% match
Post by: Heb66 on Sunday 26 March 23 09:41 BST (UK)

Hi,
What centimorgans do these shared matches measure ?
Regards....Helen.

Title: Re: DNA 12% match
Post by: eial on Sunday 26 March 23 10:30 BST (UK)

Hi Helen,  the result gave 870 cM.

Title: Re: DNA 12% match
Post by: Gadget on Sunday 26 March 23 10:42 BST (UK)

If you enter 870 in the top box, on this app

https://dnapainter.com/tools/sharedcmv4

It will give you the probability of various relationships.

For this amount it gives these possible relationships ~


Gadget

Title: Re: DNA 12% match
Post by: Biggles50 on Sunday 26 March 23 14:34 BST (UK)

Your 1/2 Sister’s 25% gives:-

tree
100%Grandparent, Aunt / Uncle, Half Sibling, Niece / Nephew, Grandchild

Title: Re: DNA 12% match
Post by: eial on Wednesday 29 March 23 05:12 BST (UK)

Thank you to ever who replied to my query.    That has given me mire insight into the possible relationships.