Establishing biological relationships between siblings is a precise scientific process used when a parent is unavailable for testing. A sibling DNA test compares the genetic profiles of two or more individuals to determine the statistical likelihood of a shared biological connection.
Contact Brashan DNA Services at +447360536054 to discuss your specific requirements or order your sibling DNA test kit online today.
How does the sibling DNA test work?
The process involves comparing specific loci (fixed positions on a chromosome where a particular gene or genetic marker is located). Because siblings inherit DNA from the same parents, they share more genetic markers than unrelated individuals.
Follow these steps to complete your test:
- Order the kit: Purchase the sibling DNA test kit via our secure website.
- Collect the samples: Use the sterile cheek swabs provided. Rub the swab firmly against the inside of the cheek for 30 seconds to collect buccal cells.
- Submit the documentation: Complete the included consent forms accurately.
- Return the samples: Place the swabs in the specimen envelopes and use the guaranteed special delivery envelope to return them to our UKAS-accredited laboratory.
- Receive results: Access your secure report within 1–2 working days of the laboratory receiving your samples.
What is the difference between full and half sibling tests?
The laboratory performs different statistical analyses depending on the suspected relationship:
- Full Siblings: Individuals who share both biological parents. The analysis looks for a high "full sibling index."
- Half Siblings: Individuals who share only one biological parent (mother or father).
We strongly advise including a known parent (usually the mother) in the test whenever possible. Including a parent's DNA allows the laboratory to "map out" the known genetic contribution, significantly increasing the strength of the final result.
Is the sibling DNA test accurate?
Our laboratory uses advanced 24-marker testing to ensure the highest levels of precision. Results are presented as a probability percentage:
- 99% or higher: Indicates a very high likelihood of a biological relationship.
- Below 10%: Suggests the individuals are unlikely to be related.
Note that relationship testing is a statistical calculation. If you require results for court or Home Office purposes, you must select our Legal DNA testing service to ensure a documented chain of custody.
Erase the doubt today. Call us on +447360536054 or browse our full range of DNA testing services to find the right solution for your family.
