When a man’s DNA test comes back positive, he is 99.9% or more likely the child’s father, and knowing what this number represents can help every member of the family understand with clarity and certainty. Whether DNA test results are overwhelming on first reading or not, the science behind them is quite simple when broken down simply. In this blog, you can learn what a positive result means, how accurate it is and how the laboratory has reached this conclusion.
What Does a Positive Paternity DNA Test Result Mean?
If the DNA test results are a positive paternity DNA test, then the DNA markers in the child’s DNA profile match those of the alleged father at all locations tested, which with near-certain scientific probability confirms that the alleged father is the child’s biological father. Professional DNA paternity testing under internationally recognized standards by accredited laboratories worldwide achieves paternity percentages of 99.9% or greater for a confirmed biological father match, which is the result reported.
Understanding a Confirmed Biological Father Match
- If it comes back positive, then the father has the identical genetic markers that the child could only have gotten from its biological father, as the two DNAs are compared at various points.
- When a DNA paternity test reports “father included,” it indicates that all the DNA markers tested for on the children’s profile match the DNA markers at the same position in the alleged father’s profile.
- If the result is positive, it does not necessarily mean 100% – it means that the scientific consensus finds it to be 100%, because the statistical probability of the father being the biological father is so high.
What is the cost of a DNA Paternity Test?
The results of a positive paternity DNA test performed by an accredited laboratory are extremely accurate, with a probability of paternity of 99.9% or higher in cases where it is determined to be the biological father. The first step for how to get a DNA test that will yield this degree of accuracy is to select a professional laboratory that follows proper collection protocols, validated methods of genetic analysis, and documented chain-of-custody procedures from collection to final report.
Probability of Paternity and DNA matching explained.
- A minimum of 16 genetic markers and most test much more are compared at accredited laboratories, and a probability of paternity result is determined that meets or exceeds the 99.9% level that is required for scientific confirmation of biological fatherhood.
- Quality samples, proper sampling protocols and laboratory accreditation are directly correlated with accuracy, so that’s why professional sampling by CLIA-approved facilities provides accuracy that courts and families can trust and depend upon without hesitation.
- A positive paternity test following witnessed and chain of custody processing is scientifically just as accurate as a paternity test that was performed personally — but with an added layer of documentation needed for use in a legal proceeding.
What is the meaning of the Paternity Probability Percentage given on a DNA Report?
The paternity probability percentage on a DNA report indicates how likely the tested man is to be the actual father, compared to the chance of a random man of the same population being the true father. Any male whose DNA matches the victim with a result of 99.9% or more is considered to be the victim’s father, with only the DNA of a scientifically unlikely other male considered to be a possibility.
Interpreting 99%+ Probability Results
- A 99.9% probability result is the probability that the tested man is 99,999 times more likely to be the actual father than a man selected at random from the general population background on which the probability was computed.
- The Combined Paternity Index (usually displayed with the percentage) is a numerical ratio that indicates the same statistical superiority in a different format, for legal and scientific purposes.
- Increased markers means increased statistical power – when laboratories test 20 or more markers, they regularly report a probability of > 99.99%, lending greater scientific confidence to the positive results they report.
How can a DNA Lab tell if a man is the biological father of a child?
Biological fatherhood is determined by a DNA laboratory, which extracts DNA from the child and the alleged father, creates individual DNA profiles and compares them at several specific locations in the DNA known as STR markers or short tandem repeats, which occur in predictable ways between biological relatives but vary between unrelated people.
The use of DNA Markers, Genetic Matching and Laboratory Analysis.
To compare the child’s DNA with that of the alleged father, DNA paternity testing analyzes 16 or more STR locations. The children receive one of each parent’s markers at each location. If all of the child’s paternal markers agree with the alleged father then there is a high likelihood of the child’s paternity, as the scientific threshold for inclusion is exceeded (a probability of more than 99.9%)
Choice DNA offers professional DNA paternity testing, legal DNA paternity test services, NIPP testing, and relationship DNA testing with full chain of custody and scientifically sound results that are accepted by the court in partnership with CLIA-accredited laboratories. From personal answers to court-admissible confirmation, you can rest assured that Choice DNA provides accurate, professionally processed DNA test results that you can trust.
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Conclusion
There is no more definitive answer than a positive paternity DNA test result and knowing what it entails will alleviate some of the uncertainty that accompanies the testing process. Choice DNA offers professional, accredited paternity and relationship DNA testing services that come with accuracy, clarity and results that every family can trust. Seek professional assistance as answers that have been confirmed warrant certainty in the lab.
