The numbers and letters in the Y-DNA DYS Values page are the results for your Y-chromosome DNA short tandem repeat (STR) tests. The first row is the locus number in the test panel. For example, for the first panel (Y-DNA12 results) each locus is numbered 1 through 12. The second row is the scientific name of each STR tested. Everyone who tests, respective to the Y-DNA12, 25, 37, or 67 marker tests, is tested for the same STR markers at the same loci. The third row contains the allele values for each STR. These are the values that make up your (and your exact match's) DNA signature.