The Y chromosome is passed from father to son and testing two males from the same family will determine if both parties are from the same male lineage. If a man had four son and each of his sons had a son, all the male in this group would have the same Y Chromosome. The advantage with the test is that a conclusive result be it positive or negative can be obtained so you are safe in the knowledge that a result will be produced. We recommend this test for situation where the alleged father is deceased or parties are unavailable for DNA testing. It is best we discuss this test with you on the phone so please feel free to contact our office to discuss.