The concordance rate for schizophrenia is around percent for monozygotic twins.

50%

Schizophrenia ia an illness that alters the normal function of the human mind. It can cause episodes of psychosis involving hallucinations, delusions, period of reduced expression, motivation and functioning. This can also lead to reduced social functioning, false belief, unclear and confused thinking. People with schizophrenia often avoid family and friends. The exact cause is still unknown but others believe that genetic and environmental factor play a role in the progression of disease.