Y Chromsome Test (Y-STR)

When one wishes to determine whether two or more male relatives share the same paternal line they can do this by doing a Y-chromosomes test.

A Y-Chromosome test can tell you:

• Whether two alleged male siblings share the same father (irrelevant of whether they have a different mother or same mother). In this way they can determine whether they are full siblings or half siblings
• If uncles, grandfather and male first cousins share a common paternal line

The second point above needs some further elaborating. The Y-Chromosome test will confirm whether there is a biological relationship between males, however, the specific nature of that relationship cannot really be determined based on solely the test. Determining exact relationship might require genealogical research.

The Y chromosome, a chromosome found only in males, remains relatively unchanged as it is passed on from father to son. This works in favor of Y-chromosome testing as it makes the test reliable.

In cases where alleged brothers wishes to establish that they share the same father, we only suggest a Y-chromosome test in cases when it is not possible to directly test the father. A paternity DNA test would be the option that provides stronger results.

You can order Y-chromosome test for two males at the cost of €385.

Visit our page for more information about our Relationship DNA testing.