Half Sibling DNA Test $125 – Best DNA Test Prices

Yes, when you order a half sibling DNA test, it is assumed that the mother is not shared, but the question is do you share the father in common or not. So if you do share the father in common, then the test results will indicate it.

Yes, in fact unless the tested siblings are identical twins, all full & half siblings have their own unique DNA profiles.  We get 50% of our DNA from our biological father and 50% from our mother. Half siblings will share some of the DNA, but not all of it.  In fact, a half siblings is expected for only approximately 25% of their DNA to match one another.  Of course, some half siblings have more DNA that matches and some have less.

Identical Twins 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 half sibling DNA test it is known that the tested brother and/or sister DO NOT share the same mother, but want to verify that they do share the same father.  Whereas, in a full sibling DNA test it is assumed that the tested brother and sisters share the same mother, but need to confirm that they also 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 tested individuals have related mothers and they want to see if they have the same father, or believe their fathers could be related, half sibling DNA testing may not produce the most accurate result.  A sibling DNA test is not a reliable option if there is a cousin relationship in the case. With this type of scenario, a paternity or maternity test with the parent in question would be the best solution. A male lineage Y-STR test for males, or an mtDNA female lineage test to look for a common female line may be a better testing option. A case manager is standing by and can help guide you to the best testing option with the most accurate result.

It is always recommended to include both or at least one of the mothers if it is possible.  This allows us to compare mother and child, thus allowing us to eliminate all of the DNA the mother provided that child. Everything left in the profile of that half sibling test participant is from their father.  Now, we can compare the remaining paternal DNA from one half sibling  to the paternal DNA of the other possible half sibling.  This will highly increase the conclusive and accuracy of the test. In general, if the mother(s) are available for testing they should be included if possible. In any event, the test can still be performed without the inclusion of the mother(s) if she is not available. If so, you may also consider running the extended analysis which will test up to 35 markers in such an event.

Short answer, NO! We really do value our clients more than to have you make your own collection kit, or "MYOK" as other entities advertise. They introduce it as a way for you to save money, but truthfully, it's just cutting corners.

When you purchase your test from PaternityUSA.com you are not charged for a collection kit or the shipping to get it to you.

We understand that sometimes the situation dictates that the DNA collection happens right away or you may lose the opportunity to obtain a sample from that person. If that is the case, you can use regular cotton Q-Tip swabs for a DNA collection. This is not the recommended method, and you should only use it in situations where you're not be able to swab again.