Sibling DNA Test

Sibling DNA Test

Full sibling and half sibling test results in 2 business days

sibling dna test

Sibling DNA testing

Sibling DNA testing determines the statistical probability that two or more persons are or are not biologically related as full or half brothers and/or full or half sisters.

A sibling test is normally performed when a standard paternity test is not possible making this test the best way of establishing paternity through the alleged father’s suspected children to see whether they are biologically related to each other.

How accurate is a sibling DNA test?

Our 44 marker sibling DNA test is guaranteed to be the most accurate test available.

24-44 marker graphic

We can perform full sibling or half sibling DNA testing in most cases without the DNA of one or both of the mothers due to the fact that we test 44 genetic markers for a more accurate result with fewer people testing. Our 44 marker testing is over 10,000 more accurate than the standard test, based on statistical reliability. While we can test for the standard 16 markers that other labs use, we have chosen not to when performing a sibling DNA test for accuracy issues.

In sibling testing, two or more alleged siblings (either half siblings or full siblings) that are being tested don’t have to share all DNA in common at all the genetic markers being examined, unlike a father and child do. In fact, a full sibling only shares up to 50% of the same DNA as their siblings, and a half sibling only up to 25% of the same DNA. This means that the outcome of a sibling DNA test relies solely on statistics.

How to read sibling DNA test results

When a DNA test for siblings is conducted, the laboratory will determine the genetic profile of each of the alleged siblings. Based on the type of genetic material exhibited by each person, a sibship index is determined. If the siblingship index is less than 1.00, this indicates non-relatedness. If the sibling index is greater than 1.00, this indicates that the two tested individuals are more likely to be true full sibling or half siblings. The higher the value of the sibling index, the greater the likelihood that the two individuals are true biological relatives. This index is translated in a probability percentage for easier understanding. A probability percentage of 80% or greater is a conclusive result.

How much does a sibling DNA test cost?

DNA Test 

Lab Processing Time

Cost of Test

2 People (Full or Half Sibling) 2 business days $199 »
3 People (Full or Half Sibling) 2 business days $299 »
4 People (Full or Half Sibling) 2 business days $399 »
5 People (Full or Half Sibling) 2 business days $499 »

 

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Home sibling DNA testing

Bio-Gene DNA Testing perform home sibling tests using our the same standards as legal sibling testing. It does not matter if all parties directly participate in the testing, or if you choose to send in discreet alternative DNA samples to learn the truth.

Our full sibling and half sibling at home DNA test examines a much higher number of markers than the industry standard of 16 markers for more accurate results. We have found lower marker tests often require many additional tested parties (at a higher cost to you and it is often more difficult to get additional potential siblings/family members to cooperate) and the test finding can still come back with inconclusive results in an alarming number of instances. Our 44 marker sibling test helps eliminate these problems in almost every case.

How to do a home sibling DNA test

The most accurate method of obtaining your DNA is to use a buccal swab, which is very similar to a “Q-tip” cotton swab. The swabs are rubbed on the inner cheeks of the mouth of those being tested. We provide all the materials needed for the DNA collection in our home DNA test kits.

However, sometimes it is not possible to obtain a buccal swab sample. We are often able to test discreet alternative DNA samples. The item containing the DNA should have been stored in a paper envelope or breathable environment without extreme temperature changes for the best results in extracting the DNA. The sample should not have been stored in a plastic bag for any extended period of time.

How to Order a Sibling DNA Test

How it works graphic

To order your Sibling DNA Home Test Kit, please complete the order form by clicking the ORDER NOW button.

 

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How will I get my sibling DNA test results?

Due to performing our high marker tests, Bio-Gene DNA Testing is able to deliver results that show conclusive results in almost every single case we handle. The testing reports are written in a way this is easy to understand, and we always provide a free consultation on testing results if needed.

Results are emailed to the ordering party in .pdf file as soon as they are released from testing and reviewed for accuracy. Generally the results are available 48 hours after that testing has begun. While not common, there may be times that an extra 24-48 hours may be needed if the samples require extended testing or special treatment. We do not charge extra for extended work or special circumstances. While we never want a delay past our 48 hour standard processing, we believe it is worth a short amount of extra work to be certain that the results we deliver to you are the most accurate that can be attained.

The most accurate sibling testing 

To review case studies from real life test situations, showing the difference between a 44 marker sibling DNA test and the industry standard 16 marker, please click here.

If you have questions you can e-mail us at support@biogenednatesting.com, or you may call one of our Genetic Consultants at 1-844-BIO-GENE (246-4363) to discuss your case confidentially.

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