<prompt> Which of the following is an example of Trinucleotide repeat mutation -Huntingtons choreaFragile-X-syndromeFriedreich ataxiaAll of the above  <response>: Ans. is d i.e., All of the above Trinucleotide repeat mutationo In this type of mutation a codon i.e. trinucleotide sequence undergoes amplification and the same codon is repeated continuously so many times in the chain.o Diseases associated w ith trinucleotide repeat mutation are Huntington-s disease CAG repeat. Spinocerebellar ataxia CAG repeat, friedreich ataxia GAA repeat, fragile-X-syndrome GGG or GCC repeat, dystrophia myotonica CTGCUG repeat, X-linked spinobulbar muscular atrophy CAG repeat and dentorubral paltidolusian atrophy CAG repeat. 