In case anyone is curious, https://en.wikipedia.org/wiki/Dual_inheritance_theory mentions the canonical example of cultural and genetic coëvolution: lactose (in)tolerance.

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.)