Due to a gene, the chance of ashkénaze jews developing schizophrenia is increased by 40% !!!From Haaretz.com

Israeli and American scientists have discovered a gene among Ashkenazi Jews that increases their chances of developing the mental disorder schizophrenia, as well schizoaffective disorder and manic depression. According to a study recently published in Nature Communications, the gene in question raises Ashkenazi Jews’ chances of experiencing the disorders by roughly 40%