A gene which is 1440 bp long codes for polypeptide that is 192 amino acids long. Please explain the discrepancy The gene contains non coding regions called introns There are 600bp at the end of the gene (after the stop codon) which comprise the untranslated region There is no discrepancy, the genetic code is 6 letters long. The promoter and untranslated regions at the 3' end of the gene comprise the remaining 864bp..