Public Sibling DNA Services
Sibling DNA analysis is carried out between two or more individuals to determine the probability that they share one or both biological parents. A full-sibling test is used to determine if the tested individuals share the same biological mother and father whereas a half sibling test can be used to determine if the tested individuals share one biological parent (either mother or father).
A DNA profile for each individual is produced and the alleles observed at each STR marker are compared; full siblings will have more alleles in common than half siblings and half siblings will have more alleles in common than unrelated individuals. Statistical analysis is performed taking into consideration the number of matches observed between the tested individuals, the frequency of the observed allele within the relevant population and whether the clients require full or half sibling analysis.
The calculations performed result in a probability of relatedness:
- POSITIVE: A result of 90-100% provides very strong evidence that a full/half sibling relationship does exist;
- NEGATIVE: A result of 0-10% is not supportive of a full/half sibling relationship;
- INCONCLUSIVE: Results falling within the 10-90% range are deemed to be inconclusive because it is not possible to determine conclusively if a biological relationship exists between the tested individuals.
An inconclusive result could be due to a low number of matching alleles between the tested individuals, alternatively, the alleles that are shared between the tested parties could be extremely common within the relevant population.
Analysis of additional STR markers may be recommended to improve the strength of the DNA evidence, however this will incur an additional cost and the result could still be inconclusive.
Sibling analysis is not as conclusive as paternity or maternity testing and should be used when it is not possible to perform other types of testing.
Which Sibling DNA Test is right for me?
You have two main options when choosing a sibling 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 DNA Testing
If you opt for a peace of mind test, we will send you a free sample collection kit. You and the other tested parties will collect your own samples following the simple instructions provided in the kit. Please note that peace of mind test results are not legally defensible.
Legal DNA Testing
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 make your test results legally defensible.
Purchase a Sibling DNA Test
Sibling DNA testing for legal purposes
To order a legal Sibling test, please call us at xxxxxxx. Order Here
Sibling DNA testing for peace of mind
Purchase a Sibling test using our online order form or by calling xxxxxxx . Order Here