![]() In your test report, you will find a chart displaying the DNA profiles for each person tested. In a true parent-child relationship, it is expected that at least one allele at each DNA locus in the child's DNA profile will be found at the same DNA locus in the biological parent's DNA. In a relationship DNA test, such as the DNA paternity test, PCR analysis is used to determine the specific alleles that you have for each STR marker. The laboratory technique used to amplify and study DNA is called polymerase chain reaction (PCR). At each DNA locus, you will have two genetic variants ("alleles"), one of which is inherited from your mother, and the other from your father. ![]() In a DNA paternity test, the laboratory generates a DNA profile of specific genetic markers (also known as short tandem repeats, or "STR") at a set of known sites ("loci", or singular, "locus") in your DNA. To understand the details of your test report, it is important to be familiar with the terminology and science behind how relationship DNA testing works. is an educational page that includes a glossary for the terminology used in the report, as well as interpretation guidelines. ![]()
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