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[Paternity analysis using four DNA markers amplified by polymerase chain reaction]
H Jorquera1, M Acuña, L Cifuentes
1Departamento de Laboratorios, ICBM, Facultad de Medicina, Universidad de Chile. ubionmol@ctcinternet.cl
Revista Medica De Chile
|February 7, 2001
Summary
DNA typing using four genetic markers reliably resolves paternity cases with high exclusion power. This forensic analysis tool accurately identifies or excludes paternity in uncertain cases, aiding legal investigations.
Area of Science:
- Forensic genetics
- Molecular biology
- Population genetics
Context:
- Paternity testing is crucial in legal and social contexts.
- Accurate DNA typing methods are essential for resolving disputed paternity.
- The Servicio Médico Legal in Santiago handles numerous paternity cases.
Purpose:
- To evaluate the effectiveness of four highly polymorphic genetic markers in paternity analysis.
- To report the experience of a specific forensic institution in resolving paternity disputes.
- To assess the reliability and exclusion power of DNA typing in real-world cases.
Summary:
- 153 cases of uncertain paternity were analyzed using polymerase chain reaction (PCR) amplification of four polymorphic DNA loci.
- A high exclusion probability (0.933) was achieved, with 37 cases excluded and the remaining cases showing varying degrees of probable to almost certain paternity.
- Paternity indices ranged from inconclusive (0.5-19) to highly indicative (over 100), demonstrating the method's discriminative capability.
- Genetic marker frequencies were consistent with Hardy-Weinberg expectations and local population data.
Impact:
- The study validates the use of specific genetic markers as a reliable and powerful tool for forensic paternity determination.
- Findings support the routine application of advanced DNA typing techniques in legal settings for accurate paternity resolution.
- The high exclusion power enhances the efficiency and accuracy of forensic investigations involving disputed paternity.