What is a Y-Chromosome Test?

The Y-Chromosome DNA test (short tandem repeat or Y-STR) is used to support or disprove a direct paternal connection between 2 or more male participants. This test is also known as a paternal lineage test. The Y-chromosome DNA test is based on the fact that the Y-chromosome is passed from father to son relatively unchanged through the generations.

How is a Y-Chromosome Test Used?

A Y-chromosome DNA test can confirm your relationship to male relatives and paternal ancestors. This test is also used to provide additional evidence in difficult paternity cases in which the alleged father is not available for testing. It can tell whether or not a tested child is related to the alleged father’s brothers and other male relatives who share a common paternal lineage. We can either send you a testing kit to collect your DNA samples at home or if your testing has legal implications, we can use a chain of custody collection process where your samples will be taken by a trained professional at one of our local collection centers.

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Y-Chromosome Test Fee

Please call for the best rate as each situation is unique and prices vary.

Example of a Possible Y-Chromosome Test Situation

Imagine a paternity situation where the alleged father is missing. A Y-STR test cannot distinguish a specific relationship between males who belong to the same paternal line – like paternity. However it can be used for excluding males from an alleged biological relationship in this situation. For example, if a male child and his alleged uncle (alleged father’s full brother) are tested, their Y-STR profiles must match. If they do not match then the alleged uncle is excluded (not considered a biological uncle) and the alleged father is probably not the biological father.

Y-Chromosome DNA Testing Used in Genetic Genealogy

Genetic Genealogy DNA test results provide an ancient picture of your family and trace your geographical roots back several thousands of years by determining your genetic haplogroup which in turn can show the migration pattern that your ancestors followed many thousands of years ago.

A Y-chromosome DNA test provides scientific confirmation of more recent relationships, like identifying a possible relative and wanting to confirm your relationship. The Y-Chromosome DNA test will tell you whether or not your Y-chromosome is consistent or not consistent with the conclusion that you and the possible relative may be related through a common male ancestor.