Something Happened to Ashkenazi Jews in Medieval Europe to Eliminate Genetic Diversity, Study Finds
About two-thirds of Jews today – or about 10 million people – are Ashkenazim, referring to a recent Central and Eastern European origin. They primarily reside in the United States and Israel. Ashkenazi Jews carry a particularly high burden of disease-causing genetic mutations, such as those in the BRCA1 gene associated with an increased risk …