missed my point. To be an aristocrat (in the continental European context) genes are just one factor, you also need good upbringing to be "well breed":
It's like pedigree dogs, they not only have to "be pure" (dog breeders amusingly sound very similar to nazis) but they have to be bought up (well trained) otherwise they are not "high born".
Pedigree humans have to be nurtured in the rareified atmosphere of a palatial estate far from the peasants, go to the best elite boarding schools and only the top exclusive universities. Only socialise and work with fellow aristocrats and of course have inheritance.
If this sounds vaguely familiar to Americans because their society evolved from a master-servant-slave structure for several centuries.