Sibling DNA Test Kit | 34 Or 46 Marker |

Yes; a sibling DNA test can determine whether brothers and/or sisters have the same father when the father is not able or willing to participate in a paternity test. It is recommended that the mother(s) take part in the test to increase conclusiveness. Our 46-marker siblingship test offers the most comprehensive testing on the market and provides the most conclusive result especially when the mother is not available.

No, in-fact unless the individuals are identical twins all siblings have unique genetic profiles.  The combination of genetic markers inherited from both parents makes every brother or sister unique.

When testing brothers for paternity, a Y-STR DNA test is a good option to consider. The Y-STR male line DNA test compares the unique Y-Chromosome (Like A Fingerprint) every father passes to his male child. A Y-STR analysis will always produce a conclusive “Yes” or “No” as to whether or not the alleged male sibling comes from the same male line.

Likewise, an mtDNA female lineage test provides a conclusive answer regarding a relationship on the maternal side.

When someone wants to see if they are a sibling or  a cousin, a sibling DNA test may not produce the most conclusive result. Therefore, we recommend instead, a paternity or maternity test with the parent in question as the best solution.  Call us at (877) 786-9543, and we can help guide you to the best DNA test.

Our sibling DNA tests are highly accurate, typically providing very conclusive results with a high degree of certainty. The accuracy of the test depends on various factors such as how many markers are tested, if the mother(s) is included, the quality of the samples collected, and the testing methodology used.

Our USA lab utilizes state of the art DNA testing technology combined with stringent testing protocols thus ensuring an accurate conclusive answer. Furthermore, our legal sibling DNA tests are valid in court.

A sibling DNA index that's greater than 1.0 indicates there's a higher likelihood the tested  parties are really either full or half siblings.

A sibship index of less than 1.0 indicates the tested parties are less likely to be related as full or half siblings.

Therefore, the higher the DNA index value goes over 1.0, the stronger the evidence is indicating that the tested parties are biological siblings.

To make our results easy to understand, this sibling DNA index number is also translated into a percentage of probability from (0-100) which provides a much easier way to interpret the test results.

Sometimes you have to do the DNA collection right away or lose the opportunity to obtain a sample. In such cases, you can use regular Q-tips  for the collection, however this is not ideal. For this reason, PaternityUSA will rush a medically sealed sterile kit to you FREE.

YES,  commonly used forensic DNA samples include ear wax, hair (must have the root ball attached), mucous on a tissue, finger or toe nail clippings, and toothbrushes. Please contact us at (877) 786-9543 for more info.

Orders before 12:00 PM EST, will be rushed a sterile kit via trackable USPS for FREE Monday through Friday to physical addresses in the contiguous USA. Orders received after 2:00 PM EST ship the following business day. We do have expedited shipping options available during checkout. Please note that for expedited shipping a physical address is needed. We cannot expedite to a PO Box.

If siblings are in different cities or states, when ordering, simply provide the additional address, and we will send the other participant a separate collection kit. The reference numbers and bar codes link the samples when received in lab. Secondary address cannot be NY or international. Please contact us with international shipping questions at (877) 786-9543.

YES, our legal sibling test packages  are valid in cases for child support, visitation rights, to change name on the birth certificate, estate, wills, probate situations, and/or any other type case where proving the relationship is required.

Further, if you need the results for immigration, CRBA, passport, the embassy, USCIS/ICE or Dept. Of Homeland Security as evidence of the biological relationship, then contact our partner AABB accredited partner at (800) 349-8515 for information on immigration testing.