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DNA IN FORENSIC MEDICINE
By
Rasha El-haddad Ali Mossa
Demonstrator of forensic medicine and clinical toxicology
INTRODUCTION
Alec Jefferys
CELL BIOLOGY
DNA IDENTIFICATION SYSTEMS
 RFLP
 SNP
 VNTR
 STR
 Y-STR
 Mitochondrial DNA
RFLP
SNP
VNTR & STR
STEPS OF DNA PROFILING
1. Sample identification
2. DNA extraction
3. PCR
4. Analysis
5. Interpretation
ADVANCES IN DNA PROFILING
 New loci
 Non invasive prenatal paternity test
 Y-str
 Mitochondrial DNA analysis
RNA
 Identification of cell specific mRNA
expression from body fluids adds a new
dimension to forensic DNA analysis.
 determination of a specific disease or
mechanisms that lead to death.
 determination of wound age and time passed
since death
EPIGENETICS
 DNA methylation, histon modification
 It may be the only way to distinguish DNA of
identical twins
 only way to detect artificial DNA
Dna profiling

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Dna profiling