can be divided into two classes. The two classes are shared and non-shared
environment by siblings reared in the same family. Non-shared environment
the environment unique to the individual. There is no single gene for
intelligence, personality traits, or behavior, although most are influenced
by multiple genes.
Many research methods and theories do not even prove that genes even
have a part in our personality or behaviors. Many people and studies
also support the fact
that our environment has a lot of influence on our personality and behaviors.