Y CHROMOSOME DNA TEST
A Y chromosome DNA test can be performed between male individuals to determine if they share a common paternal ancestor.
The Y chromosome is the male sex chromosome which is passed directly from a father to all of his male children and remains unchanged (unless a mutation event has occurred). Due to its unique pattern of inheritance all male individuals within the same paternal line will share a near-identical Y chromosome.
Y chromosome analysis can only show that males share a common paternal ancestor but does not provide a conclusion as to the nature of the relationship (i.e., whether the participants are father and son or brothers). Y chromosome analysis is carried out by analysing 12 genetic markers on the Y chromosome. The Y chromosome profiles for each individual are then compared. The number of matches between the individuals will determine whether they share a common paternal ancestor:
- FULL MATCH: This is consistent with the tested individuals having identical lineages and supports the hypothesis that they share a common paternal ancestor
- ONE MISMATCH: This is consistent with the tested individuals having identical lineages although a mismatch has been observed; this supports the hypothesis that they share a common paternal ancestor
- TWO MISMATCHES: This is classed as an inconclusive result. There is not enough evidence to determine whether the tested individuals share a common paternal ancestor
- THREE OR MORE MISMATCHES: This is consistent with the tested individuals having non- identical lineages and does not support the hypothesis that they share a common paternal ancestor
WHICH Y CHROMOSOME DNA TEST IS RIGHT FOR ME?
You have two main options when choosing a Y chromosome DNA test:
- Testing for peace of mind, which produces results that can resolve family relationship questions but cannot be used for legal purposes
- Legal testing, which produces legally defensible results that are useful for such matters as family law disputes and immigration
PEACE OF MIND Y CHROMOSOME DNA TEST
If you opt for a Peace of Mind test, we will send you a free sample collection kit. You and the other parties to be tested will collect your own samples following the simple instructions provided. Please note that Peace of Mind test results are not legally defensible.
LEGAL Y CHROMOSOME DNA TEST
If you opt for a legal test, your DNA samples will be collected by a neutral third party such as a doctor, a nurse or one of our representatives. This third-party collection is an important element of the chain of custody process, which will ensure that your test results legally defensible.
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