Getting DNA results from black market baby

+4 votes
114 views
I have an extremely high DNA match (the highest of any person to date) with a person that has been adopted as a black market baby. Some of us believe she is the daughter of one of my 7 uncles or aunts on my father's side of the family. She has absolutely no records of the biological parents. The total cM's I get from her are 357. If my1st cousin were to get a DNA test and compare the results to her would they be the same as mine or more because my uncle is the true father.?

Appreciate any opinion how to go about establishing her roots.

BTW all the uncles and aunts are deceased.
in Genealogy Help by John Nash G2G6 Mach 1 (10.5k points)
retagged by Julie Ricketts

1 Answer

+4 votes
Interesting story in the making!

According to https://isogg.org/wiki/Autosomal_DNA_statistics#mediaviewer/File:Shared_cM_Project_v2_updated.png your 357-cM match is weaker than would be expected for a first cousin -- it's more consistent with a second cousin or a first cousin once removed.

Testing a first cousin would be a way to learn more about the possible relationship, but unless that particular cousin turns out to have a really close relationship (such as a half sibling) to this black-market baby, it's likely that you'll need to test more people than just one cousin to get to the answer. It would be a good idea for both you and the black-market baby to upload your data to Gedmatch, where you might discover some more distant cousins that you both relate to, and where you'll have access to the data you may need to map the DNA matches you find.

You say that all the aunts and uncles on your father's side are deceased, but it's possible that this person's parent is somewhere else in your family, so you will need to be mindful of the sensitivities of living people.
by Ellen Smith G2G Astronaut (1.1m points)

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