DNA

DNA Bioscience’s Y-chromosome DNA test is performed to determine whether two or more males are biologically related through their father’s side of the family. For this reason, this genetic test is commonly referred to as a paternal lineage DNA test.

Also known as Y-STR testing, paternal lineage DNA testing can be used to verify family relationships when a male’s alleged father is unavailable for paternity testing and other family relationship DNA tests cannot be applied to the situation.

A son inherits his Y chromosome from his father, and the chromosome undergoes little or no change during this inheritance. Because of this fact, males’ Y chromosomes can be profiled and compared to verify whether the individuals are biologically related through the paternal family line. Males who are biologically related in this way will have practically identical Y-STR profiles, while males who are not related will have unique Y-STR profiles.

Note: While Y-chromosome comparative analysis can determine whether males are paternally related, it cannot determine the nature of the relationship—whether they are father/son, uncle/nephew, grandfather/grandson, etc.