code: def correct_chrom_names(chroms):
      
      chrom_list = []
      for chrom in chroms:
          # fix chrom numbering
          chrom = str(chrom)
          chrom = chrom.replace('23', 'X')
          chrom = chrom.replace('24', 'Y')
          chrom = chrom.replace('25', 'Mt')
          if not chrom.startswith('chr'):
              chrom = 'chr' + chrom
          chrom_list.append(chrom)
      return chrom_list
docs: Make sure chromosome names follow UCSC chr convention.