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How accurate are DNA tests?

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Quick Answer

DNA tests are close to 100 percent accurate in establishing paternity, according to BabyMed. A paternity test establishes the biological match between a baby and an alleged father.

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The number of loci, the DNA matching points, determine the accuracy of A DNA testing. A paternity test using 16 loci gives the best results, explains BabyMed.

DNA profiling is a major tool forensic investigators use to solve crimes, according to FindLaw. Investigators collect DNA evidence at the scene of a crime and compare it with the DNA profile of the suspects. Experts consider DNA testing accurate because the chances of two individuals sharing the same DNA are about one in a billion as long as those collecting, handling and analyzing the specimens follow protocols.

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