Well, there is an environmental component to all phenotypic traits. So when you want to know how an organism actually turned out, it’s more useful to measure th

Well, there is an environmental component to all phenotypic traits. So when you want to know how an organism actually turned out, it’s more useful to measure the phenotype, rather than the genotype. Also, the understanding of which genetic variants contribute to higher IQ is rapidly improving, but still very far from practically useful.