>highly non-linear There's no evidence for that, all the evidence so far points to linear additive models being sufficient to model the link between genes and

>highly non-linear There's no evidence for that, all the evidence so far points to linear additive models being sufficient to model the link between genes and intelligence. Here's one good overview: _Genetics and intelligence differences: five special findings_ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4270739/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4270739/