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  Home -> Paternity Testing FAQs -> Other Questions

Other Questions

  1. What is DNA paternity testing?

  2. How accurate is DNA paternity testing?

  3. What is accreditation?


  1. What is DNA paternity testing?

  2. DNA paternity testing (sometimes called parentage testing) uses DNA, the biological basis of inheritance, to prove or disprove the relationship between a child and an alleged father. It is based on the fact that we inherit half of our DNA from our fathers and half from our mothers.

    In a DNA paternity test, DNA samples are taken from the child and the alleged father (and the mother, if she’s available) and are sent to our lab. We purify the DNA and prepare it for testing with a battery of at least 16 DNA markers, producing a genetic profile for each tested individual. The child’s profile is compared with the profiles of the mother and alleged father to confirm that he or she has inherited DNA from the alleged father. We then perform statistical analysis to calculate the Probability of Paternity.

    For more information on the science of paternity testing, please visit our Paternity and Family Relationship Testing page.

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  3. How accurate is DNA paternity testing?

  4. DNA paternity testing is 100% accurate when done properly. Our Dual Process™ helps ensure a strict chain of custody and error-free results through the proper handling, testing, and analysis of samples.

    Many laboratories mistake the term accuracy for likelihood (or probability). The Probability of Paternity is a statistical measure of the likelihood of the biological relationship. In the case of an inclusion result (the alleged father is found to be the biological father), the Probability of Paternity could be as high as 99.999% or higher.

    All paternity tests will generate a result lower than 100%. To produce a 100% probability, a laboratory would have to test every man in the world. Because this is not feasible, a paternity test uses a population database to calculate the Probability of Paternity.

    While an inclusion result can be 99.999% or higher, an exclusion result is always 0%. This is because if the genetic profiles of the child and alleged father do not match, there is statistically no chance that the two are biologically related.

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  5. What is accreditation?

    Accreditation is the formal recognition of a laboratory for following the standards and guidelines set forth by the accrediting organization. Simply stated, being accredited is like being approved by the agency doing the accrediting.

    DDC is accredited by a number of important organizations in the fields of family relationship and forensic DNA testing. These agencies regularly examine the qualifications of our laboratory staff and inspect our testing processes and equipment. When they accredit us, they are declaring that they have validated the reliability of our lab staff, test processes, equipment, and standard operating procedures.

    The following organizations accredit DDC:

    American Association of Blood Banks (AABB)
    ACLASS Accreditation Services (ACLASS/ISO IEC 17025)
    American Society of Crime Laboratory Directors/Laboratory Accreditation Board–International (ASCLD/LAB-International)
    College of American Pathologists (CAP)
    New York State Department of Health (NYSDOH)
    U.S. Department of Health and Human Services’ Clinical Laboratory Improvement Amendments (CLIA)

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