If the relationship of father to son could really be reduced to biology, the whole earth would blaze with the glory of fathers and sons.
As they say in Italy, Italians were eating with a knife and fork when the French were still eating each other. The Medici family had to bring their Tuscan cooks up there so they could make something edible.
I don't much believe in the idea of characters. I write with words, that is all. Whether those words are put in the mouth of this or that character does not matter to me.