Abstract
Sex determination by polymerase chain reaction (PCR) analysis of the X-Y homologous amelogenin gene is highly reliable since the detection of an X-specific amplified fragment validates the procedure. Previously, we reported that 250 ng of template DNA are required for sex determination by this method. We report here a refinement of the technique to include dual PCR. Dual PCR using two sets of primers results in the detection of X- and Y-specific amplified fragments from as little as 0.005 ng of template DNA. This is a powerful technique for the analysis of trace forensic samples and its application is discussed.
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