This document discusses the genetics of diabetes. It notes that while rare genetic conditions like cystic fibrosis can cause diabetes, most cases have a strong genetic component but are influenced by multiple genetic and environmental factors. Genome-wide association studies have identified over 40 single nucleotide polymorphisms associated with small individual risks for diabetes. Several of these SNPs have helped identify previously unknown genes linked to diabetes and its related conditions. However, genetic testing has not yet proven useful for predicting individual disease risk or altering treatment.