Which seed will grow better depends not just of its genes, but also of environment, weather and of how much it was fertilized. This, for example, is one of the

Which seed will grow better depends not just of its genes, but also of environment, weather and of how much it was fertilized. This, for example, is one of the answers why rich getting richer. The difference in environment + variety of experience matters much more than difference in genes, in cases where there is no inherited disorder. By changing environment, behavior and altering mental models (unlearning the learned helplessness, for example) it is possible to improve even IQ scores. This is how the Flynn effect works - it is effect of the environment + variety of experience.