>Citation very much needed.
I'm sure that there are studies but let's be honest. This is just common sense. I'm sure that if you replace Japanese people with Berbers from North Africa, Japan will look very different.
I'm sure that there are studies but let's be honest. This is just common sense. I'm sure that if you replace Japanese people with Berbers from North Africa, Japan will look very different.
If you're saying the latter: what role is genetics playing in that scenario?
If you're saying the former: no, culture is not a genetic trait. Obviously.
In particular, in the given hypothetical, one might predict a change in the dairy culture in Japan if suddenly the population was significantly more tolerant of lactose.
(I assume the usual example of lactose intolerant is chosen because it appears some people are otherwise religiously opposed to considering the relationship between culture and genetics.)
It might change or it might not. Just because a dietary option is open to you doesn't mean you're going to take it. Nothing prevents me from eating sushi, and I still don't, and the reason is obvious: I didn't grow up eating it, so it isn't part of my normal diet.
It's one thing to say that culture and genetics are not completely independent. It's another to say that culture is heavily influenced by genetics, to the extent that it's a hereditary trait.