Psychological researchers study genetics in order to better understand the

We could call this field Genetic psychology or Behavioral genetics which relates psychology, biology, genetics, and others. This field of study is interested in investigating the genetic influence on human behavior. 

Explanation:

The psychology field could find the study of genetics transcendental because it gives an idea of how many genetic variants affect behavioral differences or how minimal or complex their effects might be. A psychological question that maybe answer with the help of the study of genetics is How much genetics affects disorders? or  How genes have their effect?

answer; i believe the correct answer is prefrontal cortex;