Behavioral geneticists are finding that within a group of people, about of the variation in personality traits such as happiness is attributable to genetic differences.

50 percent                          

Explanation:

Behavioral genetics is described as the study of environmental and genetic influences on an organism's behaviors. However, by examining or analyzing the genetic influence, a lot more information can be collected related to the process of how a specific environment is being operated to affect an organism's behavior.

According to behavioral geneticist, about fifty percent of the variations that are being seen in an organism's personality traits can be attributable to the genetic difference as every organism possess different genetic compilation.

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