ABO blood group system

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    Frederich Miescher in 1869, but its importance was not realized until 1953 (DNA). Genetic testing, “a type of medical test that identifies changes in chromosomes, genes, or proteins” (What is Genetic Testing?), however, was first done in the 1910s with ABO blood typing (O’Neil). Today, testing is used for determining paternity, determining a person’s chance of developing or passing on a genetic disorder, and to confirm or rule out a suspected genetic condition (What is genetic testing?). There…

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