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Researchers do know from twin studies that genetics plays a role in personality disorders. Environmental factors, such as childhood abuse, neglect and separation from caregivers, as well as brain abnormalities, emotion regulation, impulsivity, aggression and serotonin levels all play a role.ecause many personality domains are heritable, borderline personality disorder may be a result of a genotype interacting with adverse environmental factors. This would in turn lead to the expression of borderline symptoms or other dysfunctional personality traits.
Researchers have identified the mechanism responsible for generating our fingers and toes, and revealed the importance of gene regulation in the transition of fins to limbs during evolution. Dr. Marie Kmita and her research team at the IRCM contributed to a multidisciplinary research project.