Please consider taking the group-discounted Y-DNA37 test. This is a male specific test. Results identify the ethnic and geographic origin of the paternal line. It includes a balanced panel of thirty-seven Y-chromosome Short Tandem Repeat, STR, markers. This is the recommended test to trace the paternal ancestry of males for genealogy purposes. The additional markers refine the predicted time period in which two individuals are related and eliminate unrelated matches. A perfect match at thirty-seven markers indicates the two individuals share common ancestry in recent times. A haplogroup is determined and backed by our SNP Assurance Program. When another person shows identical results within our database, if both parties have signed the Family Tree DNA Release Form, then we will inform them of the match. The customer will be able to download and print a personalized certificate and report describing the testing process.