Question about Y symbol as used in Ydna study

+3 votes
49 views
Why do my Ydna test results show up on some records when I didn't put them there?
in WikiTree Tech by Milton Davis G2G6 Mach 2 (26.0k points)

1 Answer

+1 vote
Did these YDNA results originate with a descendant of another ancestor? DNA results (YDNA, MtDNA, and auDNA) are propagated overnight to all ancestors and and their descendants according to the rules of DNA inheritance.

e.g. A Gt Grandson of your Gt Gt Grandfather's brother took a YDNA test and entered it here. The YDNA is then propagated back up the Gt Grandson's male line to the brother and then across to your Gt Gt Grandfather and then down his male descendants.
by Rosemary Jones G2G6 Pilot (234k points)
My dna. Thank you for your reply. If said situation had taken place, wouldn't the dna results reported on the profile be those of that individual, not mine?
If the individual you are talking about had taken a DNA test then you would see both your YDNA and their YDNA. I'm assuming it is only yours that you are seeing in which case your YDNA was propagated up your male ancestors and then back down the male descendants to this person.

I've seen a couple of profiles with multiple YDNA's from different people in which case it is worth studying them to verify that they are truly related. If they're not then there is an error in the tree somewhere or there is an unknown adoption or an unrecognised NPE (non paternal event).

It will be a handy verification tool with some possibly surprising results.

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