DNA links to early ancestors - How far?

+5 votes
140 views
My wife's auDNA  {Litton-433} can be traced back to  Michael Letton III {Letton-15} but the link is gone with his father, "Michael Lutton Jr. aka Litton,Letton, Lytton" {Lutton-93} .

Would this be due to the # of generations covered or by Name Changes, or ??  The link was not lost when her family name changed from Letton to Litton so the latter possibility seems ruled out.
in Policy and Style by Raymond Dotson G2G5 (5.1k points)

2 Answers

+10 votes
 
Best answer
Autosomal tests only propagate eight degrees on wikitree. It doesn't mean that the test itself can't be used to triangulate or confirm a relationship beyond eight degrees, just that *generally* shared autosomal DNA is pretty much gone with relationships that distant, so the tests don't show. Lutton-93 is nine degrees away from Litton-433, so the test doesn't show up. Note that Y-DNA and Mitochondrial DNA tests show up differently so this doesn't apply to them.
by John Trotter G2G6 Mach 3 (39.4k points)
selected by Laura Bozzay
+3 votes
DNA is not bound by name changes. It goes from person to person.

So the lose would be because of number of generations or Michael Letton III was adopted and not the biological son of Michael Letton, Jr.
by Chris McCombs G2G6 Mach 5 (55.7k points)
I can buy the number of generations, but adoptions?  The software that runs this compilation (I would surmise) has no way of determining who was adopted that many generations ago.

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