I don't understand the Genetic Ethnicity results.
Both my father and I have done the DNA testing.

My Genetic Ethnicity results:
Central European 44%
Scandinavian 38%
Eastern European 8%
British Isles 7%
Uncertain 3%

My fathers Genetic Ethnicity results:
Scandinavian 46%
British Isles 43%
Persian/Turkish/Caucasus 11%

Why so different then mine?

I can understand some difference because I'm only 50% of my father.

Has anybody had their brother or sister tested? How similar were the results of siblings?

I'm considering having my brother as well as my uncle(Father's brother) tested.
Would it just be a waste of money?

Thanks,