<prompt> All the following diseases are associated with triplet and other repeat sequences exceptHuntingtons diseaseFriedreichs ataxiaMyotonic dystrophyHereditary motor-sensory neuropathy  <response>: Disease Nucleotide Repeat Gene affected Chromosome Fragile X syndrome CGG FMR1 Sex X chromosome Friedrich ataxia GAA FXN 9 Huntington;s disease CAG HTT 4 Myotonic dystrophy - type 1 CTG DMPK 19 Reference: GHAI Essential pediatrics, 8th edition 