<prompt> A 20-year-old man, suffers from schizophrenia. He has a monozygotic twin brother. Based on the findings from genetic studies, what is the risk in that his brother will develop schizophrenia?17273747  <response>: The risk of developing schizophrenia is 47 for mono-zygotic twins of schizophrenia patients. Epidemiology: Lifetime prevalence- 1 Point prevalence- 0.5-1 Incidence rate- 0.15-0.25 per thousand Prevalence in specific groups One parent with schizophrenia 12 Both parents with schizophrenia 40 Non twin sibling of a patient with Schizophrenia 8 Dizygotic twin of patient with schizophrenia 12 Monozygotic twin of a patient with schizophrenia 47 