Nagercoil, Tamil Nadu India (PressExposure) May 19, 2011 -- A Y Chromosome Test (Y-STR Test) is used to determine if selected males share the same paternal lineage.
The Y Chromosome is inherited and passed on from father to son through the generations and, since it has a very infrequent mutation rate, will remain unchanged through many generations. It is only broken by the birth of a daughter but if a direct male line can be concluded then all males in that direct male lineage will have the identical Y pattern; the Y Chromosome can therefore be used to test lineage in males.
Who Would Benefit from a Y Chromosome Test?
If you have doubts over your paternity but are unable to test your alleged father, by using the Y Chromosome test you are able to test any of the males on his side of the family to establish lineage.
If you are fraternal siblings (brothers) and want to confirm that you have the same father, a Y Chromosome test is a good place to start.
If you are male cousins and want to see if your fathers were brothers, or check if they shared a common Grandfather, a Y Chromosome test will confirm a paternal line.
If you need to prove a biological relationship between male relatives for Immigration purposes, one can use the Y Chromosome test as part of your application.
In adoption cases, children wanting to find their biological or "birth" families can use a Y Chromosome test to locate male relatives. Results are available in 5-7 working days from receipt of samples at the laboratory.