Stuttering Caused by a Genetic Mutation

Stuttering has always been a fascinating phenomenon to me. Stuttering is a speech disorder where the person repeats or prolongs a sound and doesn't have a normal flow of speech. I have known severe "stutterers" who have undergone speech therapy without much help. There have been famous singers (Mel Tillis is one) who stuttered severely when they spoke, but not when they sang.Now for the first