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Whether you’ve recently come in contact with a long-lost relative or are simply looking deeper into your family history, DNA testing is a fast and convenient way to determine your biological relationship to another person. However, does the closeness of your genetic material define your ability to determine your relationship? Many people wonder if it’s possible to determine siblingship if they only share the same mother or father. Accu DNA in St. Louis, MO, explains how relationship DNA testing works and how DNA testing services help their clients find the answers they’re looking for.

Can Half-Siblings Utilize DNA Testing?

The short answer is yes, but the long answer is a bit more complicated than that. Some people may assume you need both parents in common to perform the most conclusive DNA testing. However, the accuracy of the test depends on a variety of factors, including the gender of the siblings and the shared parent. 

Half-Sibling DNA Testing With a Shared Father

DNA testingIt can be challenging to do half-sibling DNA testing with only the shared father’s DNA if the potential siblings are both males. This is because all the males in a family share the same Y chromosome. Therefore, it’s important to determine that no other member of the potential father’s family could also be the father. This will help conclude if two male half siblings share a common male lineage. 

Half-Sibling DNA Testing With a Shared Mother

If siblings are of different genders or are both females, it can be easier to determine if they share the same father or mother. DNA testing services will be able to extract data only from the mother’s side to determine if there is a common biological link. Unusual genetic markers can also serve as positive indicators, but can be more difficult to determine. 

The DNA testing of half siblings may not be as conclusive as DNA paternity testing or other avuncular testing, but with the right tools it can bring you one step closer to finding out more about your family. For the fastest and most accurate DNA testing results, call (314) 845-9997 or visit AccuDNA online for more information about various tests.

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