Determine If You’re Full Siblings – Half Siblings – Not Related
Most Affordable Sibling DNA Testing – FREE 2-WAY RUSHED SHIPPING – Precise 35 Marker Test
Sibling DNA Testing
Our 35 marker sibling DNA testing service can analyze almost 150% more markers than the standard 16 marker DNA test and almost 50% more markers than the premium 25 marker DNA test offered by many competitors. We rush the collection kit with a prepaid return envelope FREE OF CHARGE.
A sibling DNA test is often referred to as a paternity test without the father. It can be used to prove or disprove paternity or maternity indirectly when the alleged father or mother is unwilling or unavailable. The results will show if the test participants are full siblings (both parents in common), half siblings (one parent in common) or not related. This is accomplished by performing a DNA analysis & comparison between two or more alleged brothers and sisters.
Adding one known parent (FREE), usually the mother(s), to the test will help increase conclusiveness.
Why Buy Your Sibling Test At PaternityUSA.com
MOST TRUSTED LAB IN USA
Our DNA testing lab performs 3 of 4 sibling DNA tests in the US. Seen on TV shows like Maury®, Steve Wilkos® & Paternity Court®, Get Accurate Answers!
We provide the most trusted sibling DNA test in the USA. Don’t risk false results buying from an entity that sends them to the lowest bidder for testing. Our lab performs all our own sibling test for just $145.
Full Siblings – Half Siblings – Not Sure If Related
Full sibling DNA testing assumes there is one known parent in common and analyses to conclusively determine if both parents are shared.
Half sibling test assumes one parent is different and will determine if one or no parent is shared. If you are not sure whether the mother and or father are shared, performing both a full and half sibling analysis gives the most complete picture of the relationship.
The DNA analysis for both full and half siblings will let you know whether one, both or no parents are shared with the other tested individual(s). A sibling DNA test may provide the answers you seek.
Need more Conclusiveness
Generally, a sibling DNA test can be performed with only two or more siblings, however adding any known parent(s) to the analysis is recommended to increase conclusiveness. You can add one mom AT NO CHARGE , and we now offer 1-day processing option of samples.
Furthermore, if no known parent(s) can be added to the DNA analysis, we recommend you consider the option for analyzing additional markers as needed to ensure you get the most conclusive result possible.
Testing Process Is Easy:
Upon receipt of order, we will ship a sterile collection kit FREE of charge.
Sampling is done through a cheek swab, which is also called a buccal, swab.
When all samples are returned to lab, you will be notified via email that the testing has begun.
Results are emailed to the address on file. If ordered, hard copy results are mailed to the billing address unless otherwise noted.
Are siblings both male? – Consider a Y-STR analysis.
If two males would like to establish whether or not they are related on the paternal (father’s) side, a Y-STR Analysis is a good option to consider.
Likewise, an mtDNA female lineage analysis provides a conclusive answer regarding a relationship on the maternal side.
You can also test other family members:
A grandparent analysis can be performed with an alleged grandparent(s) and grandchild. If a full brother-sister of the alleged parent is available, you may also perform an (Aunt/Uncle) avuncular analysis. Lastly, you may also perform a family reconstruction analysis if multiple paternal relative are available.
Need Immigration or Legal Sibling DNA Testing?
If you need your sibling DNA test results for any domestic legal proceedings, then order the accredited legal sibling DNA test kit.
Further, if you need the DNA test results for immigration, CRBA, passport, the embassy, USCIS/ICE or Dept. Of Homeland Security as DNA evidence of the biological relationship, then order the immigration package.
Other types of genetic samples:
Ear wax, hair (w/ root ball), mucous on a tissue, finger or toe nail clippings, and toothbrushes are common forensic samples. Please contact a DNA Case Manager for additional information & pricing at (877) 786-9543.
Click On The Question
Sibling DNA testing analyzes the probability of rather alleged brothers & sisters share one or two parents in common. This will conclusively determine if they are full or half sibling to thus proving or disproving paternity.
Yes, in-fact unless the tested siblings are identical twins all siblings have unique DNA profiles. We get 50% of our DNA from our biological father and 50% from our mother. All brothers and sisters are made up of a unique blend of those DNA profiles received by both parents.
Identical Twin share 100% of the genes
Full Siblings share 50% of the genes
Half Siblings share 25% of the genes
1st Cousins share 12.5 % of the genes
In a full siblings test it is assumed that the tested brother & sisters share the same mother, but need to confirm that they also share the same father. Whereas, in a half sibling test it is known that the tested brother & sister DO NOT share the same mother, but want to verify that they do share the same father. When the status of the known parent is unknown such in the case of an adoption, we can perform both a full sibling and a half sibling DNA test.
If the tested siblings are male, a Y-STR analysis is a good option to consider. The Y-STR male line anakysis compares the Y-Chromosome every father passes to his child. This Y-STR is very unique, similar to a fingerprint. When the Y-STRs of the males are compared, the result will be a precise a “Yes” or “No” answer to the question of whether or not the two males come from the same paternal line.
Likewise, an mtDNA female lineage analysis provides a conclusive answer regarding a relationship on the maternal side.
When two people have related mothers and want to see if they have the same father, or believe their fathers could be related, sibling DNA testing may not produce the most accurate result if there is a cousin relationship in the case. In this testing scenario, a paternity or maternity test with the parent in question would be the best solution. Other test options may be a male lineage Y-STR males, or an X-SV female lineage to look for a common female line. Please call us at toll free (877) 786-9543, and a case manager can help guide you to the best DNA test for the most accurate result.
The avuncular test may only produce an accurate result report with an aunt or uncle who is a full sibling to the alleged father, meaning they share the same mother and father. If a grandparent or other relative is available, testing with them instead may be a better option. Please contact a case manager at (877) 786-9543 for more information.
In a matter as important as sibling DNA testing, especially for court-admissible cases, it is never good to leave room for doubt. Ideally, if you are performing sibling DNA testing, the known parent(s), usually the mother or mothers, should be tested. A child receives half of their DNA from their mother, and the other half from their father. Having the mother in the test allows us to eliminate the maternal DNA, or DNA from the mother. The remaining unmatched DNA will then be known to be that of the biological father. In so doing, the test will produce a more precise result. In general, if the mother is available for testing she should be included. In any event, the sibling test can still be performed without the inclusion of the mother if she is not available. IF THE MOTHER(S) IS NOT AVAILABLE, YOU MAY CONSIDER RUNNING THE EXTRA MARKERS (Up to 35 markers)
YES! Our mission is to provide the most reliable, most accurate results at the cheapest prices, and as quickly as possible. Having said that, we only offer the 1-day processing option if at least 1 mom is included in the test. Without any of the mom’s DNA it may be very difficult to achieve a 99%+ results in just 24 hours.
Our first commitment to you our client is to always provide quality over speed or even cheapest prices. Some entities promise one day results, but if you read the fine print, their disclaimer says it can take 3-5 days. We do not make promises that may hinder us from being able to deliver the most accurate result available, and can deliver paternity results in just 2 days in most cases.
A fast 1 day result is no good if it produces a weak percentage of probability.
When the mother is included in a sibling test with expedited 1-day processing, results are ready in 1 business day after all samples are received in lab. If no mother is participating in the test, our standard test processing time is about 2-3 business days. This is still a fast option considering we can test more markers than competitors offering 1 day results with greater conclusiveness.
We understand that speed is often a very important factor. Also, we value our clients very much, and know how easy DNA cross contamination can occur when using an open air q-tip. Therefore, we to try to not have you make your own collection kit. The swab, similar to a large Q-tip, is painlessly rubbed against the inside of the cheek to collect skin cells from the inside of the mouth. All analysis are performed twice. For that reason, there will be 4 buccal swabs per person in your collection kit. Do two swabs on each side of the mouth. For best results, rinse the mouth with water prior to swabbing; also refrain from smoking or drinking coffee or tea for 2-3 hours before the DNA collection.
For this reason, PaternityUSA will deliver a medically sealed sterile kit to you FREE.
Sometimes the situation dictates that you have to do the DNA collection right away or lose the opportunity to obtain a sample from that person. In such cases, you can use regular cotton swabs for the DNA collection. Please note that this is not the recommended procedure, and should only be used in circumstances where you may not be able to swab at another time.
There are times when a participant is unable to submit a swab. Ear wax, hair (must have the root ball attached), mucous on a tissue, finger or toe nail clippings, and toothbrushes are commonly used forensic DNA samples. For pricing and more details on this process, please contact a DNA Case Manager at (877) 786-9543.
Upon receipt of order, we rush a sterile collection kit via USPS for FREE Monday through Friday to physical addresses in the contiguous USA. Orders received and processed by 2:00 PM EST are shipped the same business day. Orders received after that time will ship the following business day.
If participants 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 DNA samples are then linked through reference numbers and bar codes when they arrive back in lab. Please note the additional collection kit will be delivered in the same manner as the main test kit.
We Look Forward To Serving You!
Thank you for your immediate and prompt service...Highly recommendable for people wanting to provide proof to the USCIS...Good job Paternity USA...Again thank you so much. Another VERY HAPPY customer 🙂
Steve S - Home Paternity
We just did a paternity test and used our doctor as the collector - the process was easy, legitimate and cheap! I highly recommend for those of us on a budget!
Eric M - Legal Paternity
Awesome. Easy. Best Price Around! Got my son's birth certificate right now. Thank you all!
Tom - YSTR Male Line
I purchased this Y-STR test to verify that my son is the father of my grandson. Now I know for sure this sweet little boy is my son's baby. Thanks Paternity USA for the peace of mind.
Lockhart - Sibling Test
I took this test last month and my results were accurate. Easy process, good customer service and i like that they notified me of the status of my case all along the way. I always wondered and now I finally know for sure. I highly recommend you all every chance I get. Lisa L
Nguyen - Immigration
I picked paternity usa for my immigration test for my mother and sisters. I'm so glad I did. Everything great - very good service and fast.
Brenda - Half Sibling Test
I don't usually write reviews, but I feel like this one is important. To have a lingering question of whether you belong in a family or not isn't anything easy to deal with. I wondered at first, because they are cheaper than everyone else, and felt like this is an area I shouldn't skimp on, but I'm so glad I picked these guys. I didn't skimp - I just found the best deal! My test result was very definitive and left no room for question. I want to let others know that you can find your answer and peace. Pick Paternity USA, they will do a great job. I can't say enough good about them. Thanks - Brenda
J Luna - Legal Paternity
I am glad I chose this company for my paternity test. They scheduled an appointment for me and my daughter, it was within a couple of days, then the results were emailed to me less than a week later. I didn't have to do anything but show up for the appointment - they handled everything else from beginning to end.
Jenn - Home Paternity
Thank you guys for a process that is easy and quick. You've been so helpful! Jenn
mtDNA Female Line
I was given up for adoption and found a sister through online records. We did the mtDNA testing to see if we have the same mother (who is deceased), and I finally have been able to connect with my family. Even though I will always be thankful to my adoptive family, it's nice to add to that! Testing results were very conclusive, the process was easy and good communication provided the whole time. Thanks 🙂
Claitte Family Immigration
The immigration process was a hard process for me and my family and PaternityUSA has experience and was able to help us through the whole thing. Happy with your service and I will let my friends know. Sincere thanks - the Claitte Family
Juanita - Grandparent
I called PaternityUSA to help us with getting my grandchildren in from Jamaica, and so they performed the AABB accredited DNA testing for immigration. The process only took (2) weeks, and everything was very smooth. I cannot thank these people enough.
Peter Johnson - Grandparent
I had bought a DNA kit at CVS pharmacy, but I wanted to see if I was the grandparent. I discovered that I could not use the drug store kit for grandparent DNA testing. I called paternityusa, they were able to use the kit I bought, and I'm very pleased with the work they performed. They really took the time to talk to me
Rick Davis - YSTR Male Line
I found my long lost brother after 40 years separation at birth. We did a y-str test, and it was very accurate. I happy to have my brother in my life again
Sally Valega - Avuncular
This company did a wonderful job for our family, and we're so grateful we were able to find them on the internet. THANKS!!
Ordering Easy As 1 2 3
CHOOSE TEST TYPE
Choose the type of relationship that you need DNA answers for, and who is available to do the testing.
LEGAL OR NON-LEGAL
Decide if you need answers for just personal knowledge or if you need answers for court or other legal matter.
PLACE SECURE ORDER
Place order online on our secure shopping cart with credit card or PayPal. The test kit is delivered right to you.