Anxiety, depression, and other mental disorders are becoming more and more present in the public consciousness, many people suffer from them. While these disorders may have many situational or environmental causes, but with so many people battling these mental disorders, could it be genetic? Major depressive disorder (MDD) and neuroticism traits have some genetic susceptibilities. Studies have shown some correlation between polymorphism in the serotonin transporting region (5HTTLPR) and bipolar disorder, suicidal behaviors, and depression-related traits, but nothing yet to show it is responsible for MDD.
Mental disorders are incredibly complex and multifaceted, so there is no exact answer to whether these disorders are inherited. However, studies show that there could possibly be genetic factors involved. Seratonin transmitter mutations have been linked to Bipolar and other similar disorders. There is still a lot of research that needs to be conducted to determine the exact gene sequences or mutations responsible.