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23andme has a new public tool where you choose nationality of your 4 grandparents and it gives you an estimation of your ancestry composition based on their database. Every result changes but more or less its always near the average results for each nationality.
Using the 23andme prediction tool (based on 23andme database ) i made averages of 7 different predictions with same 4 grandparents from the same country.
The tool
https://you.23andme.com/public/predict-my-ancestry
For usa and south africa i used only +94% euro predictions to represent mostly whites
I dont know if this are perfect but seem reasonable
For some countries i did 2 different samples to show that results are consistent
CONTINENTAL RESULTS
EUROPEAN ONLY RESULTS
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