Sure, but it takes effort. The tendency is to be like our parents, not only because we have their genes, but also because we were raised by them. We learned our behaviors, reactions, thought processes, and many other things from them.
Our parents and immediate family members are role models --whether we like it or not. Gene's are not are not learned behaviour's Behaviour models come from the living atmosphere at home (ie; parents-grandparents- immediate relatives)-work-school and social activities.
One can say I am not like my Father--or Mother or Grandparents but in actuality our personalities develop from these role models--like them or not. They guide us either by mimicking these behaviours or absolute opposites.
This just the beginning or everyone's adult behaviour. The sense of right and wrong play a more serious role in each and everyone's development.