What Are Some Behavioral Disorders That Genes Influence?
One of the most serious disorders that causes altered behavior that is linked to a person’s genes is schizophrenia (skitz-o-FREE-nee-a). Schizophrenia is a mental disorder in which people have an altered sense of reality. People with the disorder may have hallucinations*, such as hearing voices or seeing things that are not really there, or delusions*, such as believing the FBI is “after them” when they are law abiding. This often causes them to behave in abnormal or odd ways.
