Sibling DNA Test – $149 (2 people – full or half siblings)

Results available as fast as ONE BUSINESS DAY!
order here

Our sibling DNA test is 1,000 times more powerful than standard laboratory or drugstore DNA testing kits.

More sibling DNA markers tested means the most accurate sibling DNA test. It’s a scientific fact.

We offer sibling DNA testing is over 1,000 times more powerful than the industry standard 16 marker sibling test.

Our DNA testing for sibling relationships is composed of at least 50% more specific sibling markers than the DNA industry standard. We have chosen not to offer lower genetic marker testing when performing a sibling DNA test because of our concerns regarding the accuracy of the results. This allows for us to deliver results that are the most accurate available (based on the genetic samples provided). The results from our sibling test are so accurate they are the same for both legal and home testing options.

This is the most popular testing option for reliable results for both half and full siblings, with results that are written in non-scientific language and are easy to understand.

Please contact a Bio-Gene DNA Genetic Consultant for a no-charge consultation if you have additional questions.

What is 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.

Full sibling vs half sibling DNA testing

What makes two children full-siblings or half-siblings is how much genetic information, or DNA, they share. Each of us gets half our DNA from our mother and half from our father.

Full siblings have the same mother and the same father, so these siblings get all of their genetic information from the same two people. Half siblings only share DNA from one parent. The genetic information from the other parent is different.

If you are testing to determine if you are a full sibling (sharing both parents) or a half sibling (sharing only one parent) it is helpful, but not necessary for an accurate result, to have the mother of one of the alleged siblings submit a DNA sample.

Using the DNA of the mother (or father in the case of a maternal sibling case)  allows us to eliminate the parent’s portion of the DNA from each sibling’s genetic profile, and focus only on the other parent’s contribution to the genetic code. This is the lowest cost sibling test available using as many alleles as we test to allow you to know the truth with absolute certainty.

There is no additional cost to include one mother’s DNA sample.

Private DNA testing is not available to New York residents due to New York state law. Legal DNA testing may be performed if ordered by a physician or attorney.

one day DNA results

Fast DNA results. One day processing now available!

We know how important these answers are to you, and we want to help you learn the truth as quickly as possible. Our lab is now able to offer rush processing having your results available in ONE business day after all samples have been received. The cost of one day processing is an additional $75.00.

One day processing is not available for non-standard samples.

cheap sibling dna test

How to take 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 Bio-Gene DNA Test Kit.

However, we know that sometimes it is not possible to obtain a buccal swab sample. We are often able to test discreet alternative DNA samples. To learn more about non-standard, alternative DNA samples that we can test, CLICK HERE.

How to take a DNA test

Often Asked Questions

We are often asked this question! We ask all the time “why are other companies so expensive?”

Bio-Gene DNA believes in offering our services at a more affordable price because we do not believe that these life changing answers should be so expensive that they are out of reach to those who need and deserve them.

Our sibling DNA test is guaranteed to be the most accurate sibling test available. We perform a genetic comparison examining more full and/or half sibling markers than other companies on our sibling DNA tests in order to provide you with the most accurate answer available.

It is both scientifically and mathematically more accurate that each marker over the standard sibling 16 markers tests that are tested increase the accuracy of the results.

Yes. The industry standard is 16 markers for sibling DNA testing. For every marker that is tested above that number, the accuracy increases statistically. This is a proven scientific and mathematical fact. By testing at least 50% more markers than other companies our testing is statistically at least 1,000 times more powerful.

We would not want to have anything but the most accurate DNA testing for ourselves. We do not want anything less for you either.

A DNA test can be easily conducted even if the different parties to be tested are in different locations. Each DNA testing kit is assigned a unique identification number. Bio-Gene DNA testing kits with the unique case number can be sent directly to each person. After collection, each individual can separately send the specimens directly to Bio-Gene. The DNA samples will be correctly matched at our DNA laboratory for each case using the unique case number. When ordering online, simply select the option of two or more kits (depending on the number of people testing) on the order form and enter the additional name and address in the box that will automatically show when this selection is made!
Our DNA 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 available to the ordering party through a secure client portal that is password protected. Your test results are provided in a .PDF format as soon as they are released from testing and reviewed for accuracy. Generally the results are available 3-5 business days after the lab receives the DNA samples, depending on the DNA test.

While uncommon, 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 committed time for 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 normal processing time for sibling DNA testing is 3-5 working days once all sample have arrived.

Bio-Gene DNA also offers, for a minimum additional cost, one business day processing  and delivery of your results.

most accurate sibling dna test

How much does a sibling DNA test cost?

A DNA test may well be the most important test you will ever take. We guarantee the highest quality testing at the most affordable prices. We process thousands of DNA samples every year for lawyers, physicians, adoption agencies, and private individuals. Your cost will depend on several factors, with the most important one being who is available to test.

Your choices are outlined in the fee schedule below. In addition, each private test has two options available for DNA sample collection.


Cost Number of People Testing Processing Time
$149 2 siblings 3-5 Days
$149 2 siblings + one mother 3-5 Days
$100 Each additional person 3-5 Days
$75 Non-standard DNA Sample (per sample) 3-5 Days
$75 One day processing 1 Day



Bio-Gene DNA offers TWO options for collecting your DNA samples when you order.

Purchase a Bio-Gene DNA Test Kit

This kit includes collection materials for up to 3 people, detailed instructions and a prepaid UPS overnight return mailer. Each kit ordered is sent via USPS Priority Mail with 2-3 day delivery. A tracking number will be provided for your order. We suggest one kit per address for those who are not close geographically.

Cost: $9.95 each

Make your own DNA kit (MYOK)

You may also choose to make your own DNA test kit. To learn more about using your own DNA testing kit, please click HERE.

We strongly encourage the use of your DNA testing kit for those needing testing who live outside of the United States to save time and the cost of international shipping fees.

same mother different fathers DNA test

Bio-Gene DNA Sibling Home DNA Test Kits

Our at home testing, for personal knowledge, is performed using the same process and standards as our legally admissible testing. All testing is performed in AABB accredited testing laboratories. Using more markers than other testing companies allows us to provide you with a level of accuracy that simply cannot be matched by lower marker testing.

Do you need a legal or private DNA test?

DNA Test Features Legal DNA Test Private DNA Test
Court Ready/Legally Binding Yes No
100% Accurate Yes Yes
Confidential & Private Yes Yes
 Painless Process (mouth swab)  Yes  Yes
 AABB Accredited Lab Processing  Yes  Yes
 ID/Consent Needed  Yes  No
Mother Required No  No
Minimum Age Required  No  No
Appointments Required  Yes No
Testing In Different Locations  Yes Yes

If you need to have a legal DNA test for legal/court purposes please click here.

can you do a paternity test with a sibling

How to understand 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 sibship 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 brothers and/or sisters. This index is translated in a probability percentage for easier understanding. A probability percentage of 90% or greater is a conclusive result for full siblings, and a probability percentage of 80% or greater is a conclusive result for half siblings.