dds that "genetic effects change throughout development, as genes are turned on and off, and as their effects interact with each other and with the rest of the physiological system. In psychological development, change is just as apparent as continuity, and the subdiscipline of developmental behavioral genetics explores possible genetic sources of change... An implication for interventionists is that heritability should not be equated with developmental stability; genes can be responsible for change as well as continuity in development. In behavioral genetics, 'environmental' means 'nongenetic', that is, all influences that are not encoded in DNA... Genes do not determine one's destiny; genetic influence does not imply hard-wired circuits that create a specific response... Genetic influences are indeed just influences--propensities, or tendencies, that nudge development in one direction rather than another... Genetic influence is not in opposition to such developmental concepts as embeddedness and plasticity" (I
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