Can a DNA test determine siblings?

Can a DNA test determine siblings?

Can a DNA test determine siblings?

A DNA test can determine siblings. In fact, it is the most scientific and accurate way to prove that two or more individuals are biologically related.

A sibling DNA test can establish whether brothers and sisters share the same mother and father, or share either the mother or the father. Full siblings are brothers and/or sisters that have the same biological parents. Half-siblings share only one biological parent, either the mother or father.

In AlphaBiolabs’ Sibling DNA test the two alleged siblings need to provide a DNA sample. This is a simple process and only involves rubbing a mouth swab on the inside of a mouth to collect cheek cells. When these swabs are returned to our in-house laboratory, the DNA is extracted from the cells.

Order a Sibling DNA Test

Our DNA experts then use statistical analysis to evaluate the amount of DNA shared between the individuals tested. Full siblings will have more DNA in common than half-siblings, and half-siblings normally share more DNA than unrelated individuals.

AlphaBiolabs is a UKAS-accredited testing laboratory (No. 2773), to the quality technical standard of ISO 17025, and we are certified to ISO 9001. We also employ some of Europe’s leading DNA scientists to ensure the highest level of technical ability. This ensures that your DNA tests are accurate and performed to the highest standards.

Our sibling DNA test can be ordered online today for just £149. Results are available the next day, or you can upgrade to same day results for an extra £70.  

Further details on AlphaBiolabs’ sibling testing and other DNA testing services can be found on our website. Alternatively, please call our Customer Services team on 0333 600 1300 or email