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

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. AlphaBiolabs’ sibling DNA test can establish whether brothers and sisters share the same mother and father, or share either the mother or the father.

The sample collection process is very simple and can be performed in your own home. Full instructions are provided in the testing kits that can be ordered direct from our website. In order for the two alleged siblings to provide a DNA sample, they just need to rub a mouth swab on the inside of their mouths to collect cheek cells. A DNA sample from the mother is not essential, but it is recommended to increase the chance of a conclusive result.

When the mouth swabs are returned to our in-house laboratory, the DNA is extracted from the cells. Our DNA scientists 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.

Guaranteed DNA results or your money back

AlphaBiolabs is an ISO 17025-accredited testing laboratory and is 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 paternity DNA tests always provide a conclusive result. This is because a child inherits DNA from both of its parents. It is therefore possible to identify which half of the child’s DNA is inherited from the mother and which half is from the father. If the man undergoing DNA testing is the biological father, both child and father will share identical sections of DNA at each marker analysed. If the tested man is not the biological father there will be differences in the DNA.

Sibling DNA tests are more complex to analyse, which means that you may not get a decisive answer. Across the testing industry, sibling DNA testing can be up to 40% inconclusive. This means that four out of every 10 people will not get the result they have paid for. AlphaBiolabs has been able to reduce the inconclusive rate down to 24%. However, should you use our sibling DNA testing service and not get a conclusive result, we guarantee to refund the price of your sibling test.

Our sibling DNA test can be ordered online today for just €249 with guaranteed results or your money back. Results are available the next day, or you can upgrade to same day results for only €50 more (from when samples are received in the laboratory).  

For information on sibling DNA testing any of our DNA testing services, visit our website https://www.alphabiolabs.ie, call Customer Services on 0140 29466 or email us at info@alphabiolabs.ie