Resulting from people never leaving Stearns County, Minnesota. Inbreeding to this severity results in adults teaching biology for way too long to a class full of inbred stearns county children, drinking too much german beer, and dating your first cousin. Common last names include Schramel, Mueller, Schmitz, Schmitt, Gerken, or any other german last name.
Mrs. Bio Teacher: "Okay children, did you know there is a syndrome named after us? Yes, Stearns County Syndrome manifests itself as inbreeding in Stearns County citizens."