Ancestry/Genealogy

It just can't happen. You either have the genes or you don't. You can't pass genes you don't have to your children.

But the results for location are not an exact science. The databases that each company builds will give slightly different results. The simple answer is that likely your three German grandparents were not 100% German.

All my immigrant ancestors came from Norway or Sweden. My results came back 9% Finish/NW Russian. My dad did his and 18% Finnish/NW Russian. I pushed back further and his Grandmother had significant Finnish roots. So my "Swedish" great grandmother was not 100% Swedish, her ancestors immigrated to Sweden from Finland.

I also show some British Isles and Western Europe,very low percents, that are probably travel further back than is traceable (Viking?). I uploaded my raw results to another site and that came back pretty much the same, but a small percentage Nigerian added. Like I said, I know who each of my US immigant ancestors were and at least 3 generations before them in Norway and Sweden, so Nigerian is most likely an outlier result that is not accurate.

(BTW, you probably mean crap shoot as in shooting dice. A crap chute would be something else entirely. )