Legal Sibling Test
About the Legal Sibling Test
What is a Legal DNA Test?
A legal DNA test is a type of DNA test used to establish biological relationships for legal proceedings. A key requirement of these tests is that DNA samples must be collected by an impartial third party following a strict chain of custody protocol. This means the DNA samples are collected, documented, and transported in a way that ensures they remain untouched and unaltered until they reach the testing laboratory.
The results from legal DNA tests are frequently employed in legal proceedings such as child custody and support cases, inheritance disputes, immigration matters, and any other instances where there's a need to establish a biological relationship between individuals.
How Legal Testing Works
Legal Sibling Test: 2023 Fee Schedule
For legal testing, a specimen collection and witnessing fee of $65 will apply for each person whose sample is collected at one of our locations in Canada, and $100 for each individual whose sample is collected overseas. A $25 charge will apply if individuals in the same case are collected at different locations.
3 Easy Ways to Order Your Legal Sibling Test
Frequently Asked Questions
How does the Legal Sibling Test work?
During a DNA sibling test, a buccal swab (mouth swab) is collected from each of the alleged siblings to obtain cells containing genetic information in the form of DNA (deoxyribonucleic acid). Each person’s DNA represents a unique “genetic blueprint,” similar to a fingerprint.
In the laboratory, the DNA is extracted from the cells, and specific DNA regions are amplified through a process called PCR (polymerase chain reaction) for thorough examination. The siblings’ DNA patterns are then compared to each other. A statistical analysis is conducted based on the match type typically expected for true biologically related sibling pairs, generating a “full sibling index” and “half sibling index.”
True biologically related full sibling pairs (with the same mother and father) usually have a full sibling index value greater than 1.0 in their DNA sibling test report. Conversely, individuals who are not full siblings typically have a full sibling index value less than 1.0.
True biologically related half sibling pairs (with only one parent in common) usually have a half sibling index value greater than 1.0 in their DNA sibling test report. Conversely, individuals who are not related typically have a half sibling index value less than 1.0.
The higher the sibling index value over 1.0, the greater the likelihood that the two individuals are biologically related as siblings. Similarly, a half sibling index value of 1.5 indicates that the siblings share more genetic material than would be expected by chance alone. Conversely, the lower the sibling index value is below 1.0, the lower the probability that the two individuals are biologically related as siblings.
What is the difference between a home DNA test and a legal DNA test?
The main difference lies in how the DNA sample is collected. For a legal DNA test, the sample collection process must be witnessed by an impartial third party following a strict chain of custody protocol, ensuring that the results are admissible in court. Home DNA tests don't require this, as they are often used for personal knowledge and not intended for legal proceedings. There is no difference in the accuracy between our home DNA tests and legal DNA tests.
How quickly can I expect my Legal Sibling Test results?
We understand the urgency often associated with legal DNA testing. Once the samples are received by our lab, you can expect results within 1-2 business days.
How are the DNA samples collected for the Legal Sibling Test?
To ensure DNA results are admissible in Canadian legal proceedings, the DNA samples must be collected and witnessed following a strict "chain-of-custody" protocol. We offer two convenient options to accommodate your needs:
Self-Arranged Collection: Our home legal option offers the flexibility of arranging your own independent professional, such as a physician, nurse, or notary, for sample collection and witnessing services. This individual must act impartially and cannot be related to you or have any personal or financial interest in the test's outcome.
Laboratory-Arranged Collection: With this option, our experienced laboratory staff will handle everything. They will directly communicate with all test participants to arrange appointments at a time that works for everyone. Our extensive network of sample collection locations spans across North America, ensuring there's always a suitable and convenient location within easy reach.
How does this test work if the participants live in different cities or provinces?
With our extensive network of collection centers across Canada, we can accommodate DNA sample collection from different locations. Please note, a $25 charge will apply if individuals in the same case are collected at different locations.
How does Genetrack ensure the correct person is being tested?
Legal DNA relationship atests employ strict identification and witnessing protocols to ensure the correct individuals are being tested. During DNA sample collection, each participant is obliged to present two forms of identification. One of these must be a photo ID, and they must also provide a recent photograph. In addition, fingerprints are taken as an additional measure of identification. An impartial third-party specimen collector, who has no connection to the case or the individuals involved, oversees and documents the entire process.
Can a DNA test be performed on a baby?
Yes, a DNA test can be safely performed on a baby. The DNA sample is collected via a non-invasive cheek swab, which is painless and safe for individuals of all ages.
Does the mother need to be tested?
In a paternity test, it is not required to test the mother in order to obtain a conclusive legal DNA test result. The test can be absolutely conclusive even with just the alleged father and child's samples. However, including the mother's DNA can help strengthen the results, but it is entirely optional
For other relationship tests like sibling or grandparentage tests, the inclusion of the mother's DNA may help in obtaining more precise results.