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DNA Tests - Siblings Testing
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DNA siblingship tests determine the statistical probability of whether siblings (brothers and sisters) share the same two parents or not. The cost of the DNA testing service includes two siblings, but you may add more as needed; for instance a third sibling.

When the issue of siblingship is in question, the recommended method to determine whether individuals are true biological siblings is to test their parents. In situations where the alleged parents are unavailable for testing, a DNA siblingship test can be performed to analyze the relationship of biological siblings.

Including one common parent greatly increases the accuracy of this type of analysis and is recommended if at all possible. If this is not possible, disclosing that siblings share a common mother or father can also lead to more meaningful results.

Unlike a paternity test which will always provide a conclusive result, siblingship tests are different. When a siblingship test is conducted, the DNA laboratory will determine the genetic profile of the alleged siblings. Based on the type of genetic material inherited by each sibling, a siblingship DNA index is determined. If the siblingship DNA index is less than 1.00, this indicates non-relatedness. If the siblingship DNA index is greater than 1.00, this indicates that the two tested individuals are more likely to be true biological siblings. The higher the value of the siblingship DNA index, the greater the likelihood that the two individuals are true biological siblings. To analyze the possibility that the siblings share only one common parent versus two common parents (mother and father), a half siblingship DNA index is obtained. The ratio of the half siblingship DNA index versus the full siblingship DNA index would provide you with an idea of whether the two individuals are more likely to share only one common parent (e.g. mother only) or two common parents (mother and alleged father).

Our siblingship tests are preformed using what's known as an "All-vs-All" methodology. For example, if you have two siblings, Alice and Bob, one report will be generated which details the relationship between Alice and Bob. With three siblings you would receive 3 reports which describe the relationships between: Alice & Bob, Alice & Charlie and Bob & Charlie. Four siblings would yield 6 reports: Alice & Bob, Alice & Charlie, Alice & David, Bob & Charlie, Bob & David, and Charlie & David. The amount of reports would subsequently grow exponentially. If you have any questions regarding these reports, please feel free to contact us.

Our DNA tests include...

  • Discreet two-way shipping including USPS return.
  • Legally binding AABB-accredited DNA tests are available and include shipment of the testing supplies.
  • 99.999% accuracy guarantee for inclusions, 100% for exclusions.
  • Ability to check status and final DNA test report online.
  • Fast test results - final results are usually received within 3 business days, 5 days guaranteed.

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DNA Testing Services

Buccal Method -
"Cheek Swab" Test

To gather a DNA sample for testing, the buccal method, also known as the cheek swabbing method, is often the preferable option for those who have very young children. Simply use the provided swab that comes with the paternity test kit to swab the inside of your child's cheek. And just like that, you've got the DNA sample you need.

INOL offers quick, easy, and affordable DNA testing services. DNA testing services from INOL involve several simple steps that include DNA sample gathering through cheek swabbing sampling from the individuals , DNA sample submission, and comparative DNA analysis in our lab. When you do dna testing with INOL, most analysis results are available within three business days. We have a five-day results guarantee.

DNA Testing: Getting Started

You've wondered long enough, don't wait any longer. Now is the time to find out! With quick, confidential, and affordable DNA testing services from INOL, you can stop wondering and start knowing. Only then will you be able to really move forward with the answers to one of life's most basic questions.

INOL offers a patented, FDA reviewed, non-invasive, self-administered DNA collection system. The process is easy to understand, simple to do and takes just a few minutes. Simply follow the included instructions to send a small DNA sample back to our laboratory. Everything, along with the special mailing envelope, is included.

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If you have any questions, or would like to learn more about DNA testing, please contact us.