Schizophrenia and Bipolar Disorder are Caused by _____

Question

Schizophrenia and bipolar disorder are caused by _____.
A) one gene, plus environmental triggers
B) the same gene
C) many genes, plus environmental triggers
D) copy number variants, without environmental triggers
E) the same mutations that cause autism spectrum disorders

Accepted Answer

Both schizophrenia and bipolar disorder have been found to have a complex etiology involving many genes and environmental factors, such as prenatal infections or trauma. No single gene or mutation has been identified as the sole cause of these disorders. Copy number variants have been linked to some cases of autism spectrum disorders, but not necessarily to schizophrenia or bipolar disorder.