Schizophrenia is believed to have a strong genetic component, but it is not entirely determined by genetics. Research has suggested that schizophrenia is a complex disorder that involves the interaction of many genetic and environmental factors.
The risk of developing schizophrenia is higher among people who have a family history of the disorder. Studies have shown that the risk of developing schizophrenia is approximately 10% for first-degree relatives (such as parents, siblings, and children) of people with the disorder, compared to a risk of around 1% in the general population.
There are also many genetic variations that have been associated with an increased risk of developing schizophrenia, although no single gene has been identified as the cause of the disorder. Additionally, environmental factors such as prenatal infections, substance abuse, and stressful life events may increase the risk of developing schizophrenia, particularly in individuals who are genetically predisposed to the disorder.
In summary, while genetics plays a significant role in the development of schizophrenia, it is likely that both genetic and environmental factors interact to contribute to the development of the disorder.