Despite genes and the environment both influencing a person, the environment is more important. Consider a child raised in a tidy, organized, and punctual military family. Whether they are predisposed to a Type A or Type B personality, they will likely grow into a Type A person because of their environment. Therefore, the environment is more important in determining who we are.
Consider the aggressive child in this argument. One may say that the child has its mother’s genes, and so the type of parenting they receive (i.e. environment) is genetically influenced. The child may have its mother’s genes if they are aggressive, but they could just as easily have not inherited them from her. Their mother’s level of aggression is an environmental influence on the child even if her behavior is genetically influenced. Thus our genes don’t influence our development much, but how our family’s genes manifest does impact us. However, the impact of our parents’ genetic predispositions is part of our environment, not our genes. Evocative gene-environment correlations erroneously imply that our genes influence our environment more than they do. As is the case with this aggressive or unaggressive mother, our environments are mainly dependent on chance.