The Y-STR paternal lineage test is used to determine whether two or more males are related through the paternal/male line. The Y chromosome is passed from father to son relatively unchanged through many generations. Males who are related through their fathers will have the same or similar Y-STR profiles. This test can confirm relationships to long-lost relatives and paternal ancestors.

This test is used to support or disprove a direct paternal connection between 2 or more male participants.