All of the following are characterized by trinucleotide repeat affecting the job coding regions except: (A) Friedrich ataxia, (B) Fragile X syndrome, (C) Huntington disease, (D) Myotonic dystrophy
Answer is C. ref Robbins 9/e p168 Huntington disease is characterized by trinucleotide repeat affecting the coding region.rest all conditions mentioned in the options affects the non coding regions