So what this means now is that those traits we then look at and so readily see -- facial features, skin color, hair structure -- are not determined by single genes with big effects, but are determined by many different genetic variants that seem to vary in frequency between different parts of the world.
Ara bé, això significa que aquests trets que mirem i veiem tan fàcilment ... trets facials, color de pell, estructura del cabell ... no estan determinats per gens simples de gran efecte sinó per moltes variants genètiques diferents que semblen variar en freqüència entre diferents parts del món.