IDTO DNA provides Sibling DNA Testing services for legal and non-legal purposes to alleged siblings looking to prove a shared parent.
What is a Sibling DNA Test?
A DNA sibling test is genetic test that helps to determine a biological relationship between two or more individuals who believe they share a common biological parent. Samples will tested on 18 to 22 genetic markers.
How does DNA sibling tests work?
A sibling DNA test compares the genetic markers of two or more individuals that determines the biological probability they share one or both parents. Since siblings inherit different combinations of DNA from their parents, the test analyzes selected genetic markers across the genome to build a statistical probability of a biological relationship.
Testing Types:
- Full Siblings: Individuals who share both biological parents will typically show a higher probability, as they share more common genetic markers.
- Half-Siblings: Individuals who share only one biological parent will have a lower, but still significant, probability of a relationship.
- Unrelated Individuals: These individuals will show a very low probability, confirming a lack of biological relationship.
Overview of Your Results:
The results you receive has a conclusion at the bottom of the document detailing the lab’s findings. Below is an example of what you might expect based on the lab’s conclusion.
Not Excluded means there is a strong possibility the probability the siblings are biologically related.
Is Excluded means the individuals tested are not biologically related
Inconclusive means based on the analysis the lab was unable to conclude if the individuals are related or unrelated.
How to increase testing accuracy?
Adding the mother (if available) of one the tested individuals will increase the efficiency the lab’s analysis. Adding a known parent’s sample helps to identify the one parent’s genetic contribution to her child which will allow a clearer path to determine a possible biological relationship.
When is this test commonly performed?
Siblingship testing is commonly performed when a common parent in question is unavailable to perform a direct parent-child DNA Test. This testing option can be performed for legal and peace of mind reasons. Normally performed when a paternity test cannot be performed to determine paternity.
Reasons to perform sibling test is listed below.
Below are the testing options we offer.
IDTO DNA Sibling Options:
Legal Test: A legal sibling test is a DNA testing option that requires a strict chain of custody. DNA samples must be collected by an independent third-party sample collector, and the analysis is performed by our partner AABB-accredited laboratory. This accreditation ensures your results will be accepted by immigration agencies and family courts nationwide.
Non-Legal Test: Non-legal peace of mind sibling DNA testing is self-collected option that can be performed in the comfort of your home or in-office. The results from this option cannot be used for any legal purpose.
How much is a DNA test for siblings?
IDTO DNA pricing for Sibling DNA Testing starts at $299.99 for non-legal DNA test kits. See out options below.
Home Testing Kit:
Pricing Starts at $299.99
At Home Sibling Testing option is for peace of mind purposes only. Results cannot be used for legal purposes. Below are the contents of DNA test kit:
- 4-6 sterilized buccal swabs (2 swabs per person)
- Sample collection instructions
- Contact identification form
- Prepaid overnight FedEx return shipping
Legal Testing
The cost of legal sibling (brother and sister) DNA test starts at $499.99. See below to schedule an appointment in-office.
Where can I to get sibling test?
Call 888-204-0583 to schedule an appointment in city near your home. We have over thousands specimen collection sites in our network in every major city nationwide.
What is the method of collection?
The standard method of collection is a cheek swab. Blood sample collection is another viable option; however, it is a painful and invasive method. Both methods offer the same accuracy.
Alternative Forensic Sample Collection Options:
When the cheek swab method is not possible, the following alternative samples may be used to help determine a sibling relationship:
- Hair follicle
- Toothbrush
- Earwax
- Mucus on a tissue/napkin
These are the most common alternative samples used. Note that alternative forensic samples are not legally admissible. For questions regarding forensic samples, call 888-204-0583.
Frequently Asked Questions
Are sibling DNA tests accurate?
Yes. All tests performed by our AABB-accredited partner lab. This ensures legal results are recognized in family courts nationwide and by all state and government institutions. Our partner laboratory uses between 18 and 22 genetic markers for comparative analysis to determine the probability of siblingship are 99% and higher.
Can my results be used for legal purposes?
Yes. A sibling DNA test performed legally can be used for legal purposes.
Can you do a Sibling DNA test without parents?
Yes. A DNA sibling DNA test can be performed without a parent’s involvement. Please keep in mind if a parent is involved it contributes to increased accuracy of your results.
Can a DNA Sibling test result be used to confirm Ancestry Testing research?
A Sibling DNA test can be an option to confirm a biological relationship with someone you believe to be your sibling, based on Ancestry research. The itself is not an ancestry test.
Keep in mind that ancestry testing and DNA relationship testing serve different purposes:
- Ancestry Testing: This type of testing is designed to explore ancestral lines and cultural lineages. The results are primarily for entertainment or informational purposes and cannot be used legally.
- DNA Relationship Testing: This testing determines if individuals, such as parent-child, siblings, or grandparent-grandchild, are biologically related. The legal version of this testing can be used for legal purposes.
Why Choose Us IDTO DNA
Since 2004, IDTO DNA has been a trusted resource for legal and medical professionals who require reliable sibling DNA testing. Our knowledgeable staff will guide you in selecting the correct genetic test for your specific situation. This careful attention ensures you get the right test the first time, saving you the hassle and cost of re-testing.