They’re yellow but of course they all have different patterns
Genetics: that deals with the heredity and are varnation of organisms.
and
Enviroment: that condition by which one is surrounding.
"I think"
<span>Luca Cavalli-Sforza is a geneticist who hypothesized that the skin-color change came late because previous people had complete vitamin D access to the foods that they are eating. But the moment they started farming, the main vitamin sources are reduced, making a larger gain of having light skin.</span>