Bandera de Estados Unidos

Un sitio oficial del Gobierno de Estados Unidos, Departamento de Justicia.

Principles of Forensic DNA for Officers of the Court

Use of QC Samples

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Laboratories have access to samples of known composition that can be processed with each batch of unknown (casework) samples. These are known as positive control samples. These control samples may be purchased and have a certificate of authenticity, or may be produced by the laboratory (e.g., from donors).

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