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Genetic factors play a significant role in the development of ASPD. Research indicates a substantial genetic influence on personality and temperament dimensions related to the disorder, such as fearlessness, impulsive antisociality, and callousness. This is in addition to findings on the heritability of the disorder and specific genetic markers.

Genetic Contributions to ASPD

A researcher is studying the genetic underpinnings of antisocial personality disorder (ASPD). Based on current scientific understanding, which of the following findings would be most consistent with the established role of genetics in this disorder?

An individual was adopted at birth and raised in a stable, supportive, and nurturing home environment. Their biological father, whom they never met, has a documented history of impulsive behavior, disregard for the rights of others, and repeated legal issues. In early adulthood, the adopted individual begins to display significant impulsive antisociality and a notable lack of empathy, despite having no history of abuse or neglect. Based on this scenario, what is the most likely primary contributing factor to the individual's behavior? Explain your reasoning.

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