Locus (plural: loci) is a term used for the DNA markers that are tested and reported on your DNA Testing results. On each report there are generally sixteen markers displayed, fifteen of which are used to help determine your DNA Test results. The names of these loci are listed on the report. An example of one is D2S1338. Each person has two genes at each marker. On your DNA Test result you will sometimes note that there is only one number listed. This means that at this marker a person has two of the same. For example, if at the D2S1338 a person has two 8s the report will only show that gene once.
In the case of a DNA Paternity Test, the alleged father must match at least one of these numbers at each of the fifteen markers. Without matches at each position he may be excluded as the biological father of the child. Having the biological mother included with each DNA test will strengthen the results of your test.
The last marker on a DNA Test is the AMEL (short for amelogenin) gene. This is the gene that indicates a person gender. This is not generally related to the actual results of a DNA Test.
If you have questions about your results and what they mean, feel free to call the IDENTIGENE client support team at 888-404-4363.
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Latasha Wilkins says
My paternity test only show 9 genetic systems. Im not understanding why only 9 and not all 15. My husband matched all nine it says. But I keep researching and theyre all saying all 15 gentic systems should match. There is a probability that the other guy could be the father still? Court told me they needed both men to be tested. But only tested my husband. I just want to make sure its accurate.
KD says
Latasha,
Was this an IDENTIGENE test? If you can provide me with a case #, I will look into it for you. Thank you for contacting us. Best, IDENTIGENE
KD says
Thank you. We can only help with IDENTIGENE tests bought directly from us or a drugstore. Please contact DSS for help. Best wishes to you.
Latasha Wilkins says
No, it was court ordered through dss. Case # 201300711 p-01571-13.
MICHELLE says
Hi My sons father took paternity tests for both my kids. One of his kids only matched 11 of the 15 allies It says he is 0.00% the father. But he is the father, He was the only man I was sexually active with. I’m positive about this. 100%….we just re did this test, this time I also swabbed my cheek…..I dont understand how Can 11 out of 15 give him a 0.00%……..he IS HIS FATHER!!
WE ARE SO CONFUSED.
KD says
Michelle,
Have you contacted our client support staff at 1-888-404-4363? They are open 9 a.m. to 8 p.m. EST M-F. Our recommendation would be to make sure that you follow the instructions carefully, witness the swabbing of each participant and follow the swabs to the mailing facility to ensure honesty. After you have done this, you can feel certain the results will yield an accurate answer. Social Media (DNA Testing Blog Staff) does not have access to your results. We recommend calling client support to discuss your case further. Thank you!
MICHELLE says
THE OTHER CHILD MATCHED 99.999%
Jmen says
What ever happened with this? I had the same issue. I did the test two different times the second one with the mother. She swears it must be wrong, but it says I am not the father because a few of the 15 do not match.
Is something wrong with Itentigene???
breanna says
Hi Jmen,
IDENTIGENE is a highly accredited lab and implements several controls to ensure the highest level of accuracy and quality in our testing.
The human genome shares many of the same genetic information, however, in order to share a paternal relationship, the child and father need to have matching genetic information at each location tested. The child inherits half of their DNA from their father and half from their mother, thus half of the child’s DNA will reflect the DNA from the biological father. The only time a child and father’s DNA won’t match is if we identify that there is a genetic mutation in the gene. This rarely happens, but is accounted for.
Another aspect of paternity testing you’ll want to understand is that the strength of the match is important. Although the father and child may “match” at many of the locations on the DNA, it may be a commonly shared allele between the population, thus not proving paternity. Any two given people may have people may have a match at a given location, but this does not prove paternity. IDENTIGENE scientists accurately determine paternity with matches and strength of the matches.
Hopefully this helps to answer some of your questions, but if you would like to speak to someone about your particular test, you can call us at 1-888-404-4363. We would be happy to help explain your results and what they mean.
Anijekwu says
I had a paternity test done in South Africa by a company based in Nigeria, My blood sample and that of my son was taken in Nigeria and sent to South Africa for the test, and the result came 2 weeks later. The result showed 14 mismatches out of the 26 Loci considered for the test, and the final conclusion is that I am excluded of being the biological father of the Child, but the Child resembles me a lot, what further test can I do to re-confirm if this result is correct or not.
Identigene says
Hi, Anijekwu! Physical appearance is never proof of paternity; only DNA can do that. If you tested with an accredited lab, and you’re sure the child’s sample really was that child’s, then you can trust the results you were given. Whether you do a blood test or a test using DNA from cheek swabs, the accuracy is the same.
Tray says
How accurate is 1/2 sibling testing . It said .6% we matched on 10 out of 21 with no parents being tested ! How can I get a really answer
Identigene says
Hi, Tray. Accuracy depends a lot on how much DNA you actually share in common. Your chances of getting conclusive results are greatly optimized if the mother(s) of the participants are also willing to contribute their DNA.
Abby says
We did two separate paternity tests thru you (DDC now) they both yielded the same result with the same allele numbers at each locus marker, but on the second test I noticed two different locus markers that aren’t on the first. What is the cause of this?
Identigene says
Hi, Abby. It may simply be that the lab chose to test a few additional markers on the second test in order to confirm results; that’s usually the reason, and it’s nothing to worry about.
kimberly says
what is the best agency to find out who my father is? I dont know where to start with this. My mother got pregnant with me at 16 years old in Buffalo, New York while on summer vacation….with that i dont think she knows who the guy was. I am 46 years old and have yet to know who my biological father is. How can i research this to find out? I really want to know.
Identigene says
Hi, Kimberly. You may want to consider uploading your DNA to an ancestral familial database to see if you get any relationship hits. If you’re lucky, that may lead you eventually to your father. Or you can always start with a private eye; many of them have access to databases. I wish you good luck! Of course, when you do find him, we’ll be happy to confirm that relationship with DNA testing.
Mariah says
What percentage does a genetic mutation play in a DNA test, and what does the mutation mean.
Identigene says
The genetic mutation doesn’t “claim” a percentage, per se, in a DNA test. But it is factored in when doing the calculations for probability of relationship. A mutation is just a genetic aberration. If there is a mismatch at a particular location due to a known mutation within an ethnic group, then that is taken into account during analysis.
KK says
I leave in Zambia. How do I get access to your paternity test kit?
HomeDNA Identigene says
Hi, KK. This particular paternity-test kit is only available in the United States, but our parent company DDC does international testing. You’re welcome to email contact@dnacenter.com.
Alyssa says
How common is it to have the same number at a allele size? My daughter had 5 and only tested for 10 locus.
HomeDNA Identigene says
Hi, Alyssa. It’s extremely common.
Zibuyile says
I took a test me the mother n our daughter and the alleged father n the result came back saying he’s excluded as the father because of 11 of 15 loci what this mean? we did the test in addington hospital. And also I would like to know if it appropriate that they email the result?
HomeDNA Identigene says
Hi, Zibuyile. Your result means that the man tested is not considered the biological father of the child, per DNA testing. How the lab delivers the test results to the customer is at their discretion.