<prompt> The most-commen form of DNA variation is?Single nucleotide polymorphismCopy Number Variations CNVsTransposonsMutations  <response>: Ans. a Single nucleotide polymorphismRef: R 9thpg 3Single-Nucleotide Polymorphisms SNPsVariations at single nucleotide positions QMost prevalent Q and important form of genetic variation.Always bi-allelic QCan occur in exons, introns, intergenic regions and coding regions1 of SNPs occur in coding regions 