Quote:
Originally Posted by MoneyGuy
Do we think that the AncestryDNA testing is accurate? I got a test as a gift and just got my results - 50% British, 40% Eastern European and 10% other. I don't know how they can tell that from saliva. My parents were both German. My daughter suggests my wife and I both take the test and then she does to see if hers is an average if her parents'.
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Saliva contains DNA.
However, telling different types of Europeans apart, especially Germans, is often impossible, unless you are a unique population like the Basque, Fins, Sami, etc.... There have been multiple waves of German invaders into the British Isles: Celts, Angles, Saxons, Jutes, etc... and then the secondary invaders, which would also carry German DNA, Normans, Vikings, etc...
Telling the average German's DNA from the average British person DNA isn't really possible. My guess is they are identifying what is "British" by using a mixture of German plus other British founding populations. That's not going to provide you with any certainty to percentage though, as for example you could be German plus another founding non-British population.