... role in understanding personality traits and should be kept in the forefront of psychology as a prominent research theory. Most psychological personality theories investigate only one aspect of behavior. Whether it is a psychoanalytical approach or phenomenological approach, most theories concentrate on one field of personality psychology. This phenomenon also holds true for the biological approach. Behavioral genetics, essentially, attempts at understanding behavior (personality traits) from a genetic (biological) mechanism. Behavioral genetics is a fundamental theory of understanding the origins of personality and cannot be disregarded. However, one should be thorough and therefore all theories should be applied when trying to understand a particular personality or behavior. I strongly believe that genetics plays a very large and fundamental role in behavior. The psychological triad: thinking, feeling and behaving are all products of our biological features. Theoretically, our cerebrum is the organ that performs those functions. The biological units that encode ...

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