LMy sons father was diagonsed with schitzopherinia upon releleased from the Navy over approx 50 yrs ago. My qestion is it heritity as my son also two kids, and his little girl aprox age 12, has been having problems with anger issues and is ok for a few weeks but then seems to hav complete mental breakdowns an screaming fits an lack of despect for anyone in authority, as my son , 42 as also been sweet an careing one time he visits and next time he visits is vulger an defiant tward everyone in the family. Guess my main question is, is this heridity.???