Legal Sibling DNA Test

Description

When two or more people have the same biological parents, they are classed as full siblings.

Half siblings only share one biological parent – the mother or father.

For a sibling DNA test, cheek swabs are used to collect DNA samples from each sibling. For the most conclusive result, we also ask for the biological mother’s DNA sample, if available.

The DNA samples are analysed and compared to determine the genetic profile of the possible siblings and calculate a sibling DNA index or likelihood ratio.

• A likelihood of greater than 10 supports that the tested individuals are either full or half siblings
• A likelihood of less than 0.1 is not supportive, meaning the individuals are unlikely to be related
• A likelihood which falls between 0.1 and 10 is considered inconclusive, which means a relationship cannot be determined based on the statistical probability obtained from the analysis

For a DNA test to be valid in a court of law the test must be performed by a professional and a strict chain of custody must be maintained.

ALL SAMPLES ARE TESTED IN THE UK BY A UKAS AND MINISTRY OF JUSTICE ACCREDITED LABORATORY