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Avuncular DNA Test

What Is An Avuncular Test?

avuncular dna test

This DNA test is often referred to as an Aunt or Uncle DNA test. It is used in cases where the alleged father is not available to establish paternity indirectly. A full brother, or sister, of the possible father can verify their biological relationships with a possible niece or nephew. This means if the report shows they are biologically related their brother is the biological father of the child.

Our Aunt-Uncle testing can also be used to prove maternity for a child who was adopted, or was missing. A maternal avuncular test would use a full brother or sister of the suspected mother, using the same process.

Avuncular tests can only be done with the alleged parent’s full brother or sister. We do not offer Avuncular testing using a half sibling of the parent because of this. The reason is the results with cannot be guaranteed to be accurate.

The Science of Aunt and Uncle DNA Testing

Aunts, uncles and grandparents share 25% of common DNA with their nieces, nephews or grandchildren. On the other hand, parents each share 50% of their DNA with their children. This is why a direct paternity test is always a “yes” or “no” answer. An avuncular test result will show a probability range for the relationship. This probability will range from 0% to 99.9%. This is due to the suspected father’s siblings sharing half of his genetic makeup.

Avuncular DNA Test Results

The probability percentage is also scientifically converted to a Relationship Index. If the relationship index is less than 1.00, this indicates that they are no related. If the avuncular index is greater than 1.00, this indicates that the two tested individuals are likely to be true biological relatives. The higher the value of the relationship index, the greater the likelihood that the two individuals are related biologically as aunt or uncle, and niece or nephew. A relationship probability of 91% or greater is considered proof of the relationship.

Often, adding the mother of the niece or nephew to the testing will help provide a stronger probability to include or exclude the relationship. Having the mother’s sample enables the labs scientists to eliminate her share of genetic inheritance found in the child’s DNA.

There are times that it is not possible, or desirable, to add a mother to the DNA examination. In these cases, adjustments are made in lab to account for this. Our avuncular testing starts with looking at 24 genetic markers, and comparing those markers among those who have submitted a DNA specimen. If a conclusive result in not able to be reached at this level, the an automatic upgrade of the number of loci studied will take place. Addition genetic material will be added, as necessary, up to 46 markers (as applicable), for the strongest results.

Other Relationship DNA Tests

Depending on your particular situation, there are other DNA test options to verify a relationship. A sibling DNA test can determines if participants are full siblings or half siblings. Often a grandparent DNA test can be done when one or both of the suspected father’s parents are willing to submit their DNA for testing. In cases where tested parties are only male, we recommend you consider a Y Chromosome test. This may provide the strongest result than an aunt or uncle test as all males descending for a common paternal ancestor share the same Y chromosome markers. While this test result will also be a simple Yes-or-No answer, rather than a percentage probability, it is not recommended if two or more male relatives from the same family are the possible father of the child.

Questions? Call us At 1-855-362-5224

Best Avuncular DNA Test

Journey Genetic Testing Customer Reviews

Great service

Rated 5 out of 5
June 29, 2022

“Thanks for your response to all of our voice and e-mails. I’m sure it can be frustrating at times dealing with anxious customers pestering you for results. Your customer service has been impeccable and we will certainly recommend Journey Genetic Testing in the future.”

Leigh

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Rated 5 out of 5
June 24, 2022

“We just got our results and found out that we are identical. I think everyone thought we were except my mother’s doctor. We have always looked just alike. I want to say thank you. It’s like we received this wonderful gift, 50 years later than we may have liked, but still very much a gift. We just couldn’t imagine any twins being closer than we are, at least emotionally. We’re best friends. Once again, thank you so much.”

Suzy

Happy With Your Service

Rated 5 out of 5
April 30, 2022

“We have received the results really fast. We are glad to be reassured that our girls are identical. Thank you.”

Charlotte

Excellent Experience

Rated 5 out of 5
February 16, 2022

I got test results back from an ancestry company but they could not give me solid answers. I spoke with one of your representatives who explained the difference and why I should use a person to person DNA test. Your process was simple and easy to understand, and the results came back in just two days, rather than weeks like the other test I took. Thank you for explaining the difference and now I know for sure. It showed we were not related after all. Very relieved to know for sure. Thank you!

Randy

Thank you!

Rated 5 out of 5
January 5, 2022

Great job! Everything was fast, and just as you explained it to me. I am glad that I went with your company.

Henry

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