13869. THE BIOLOGICAL BASIS OF SCHIZOPHRENIA. Examines the genetic theory of the origins of schizophrenia. The analysis focuses on the genetic linkage of inherited phenotype to the onset of the disease, rather than on the symptoms or treatments of schizophrenia. Evidence for alternative causes of schizophrenia are assessed and the problems in determining a biological/genetic basis considered. Concludes that a genetic cause of some but not all forms of schizophrenia has been demonstrated. 20 pages, 29 footnotes, 31 bibliographic sources.