DNA forensics

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DNA forensics
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Introduction
Forensic DNA profiling consist of two parts 1.
Creating a DNA profile using basic molecular
biology protocols 2. Applying the principles of
population genetics to prove a match
mathematically
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Uses of forensic DNA profiling
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Suitable crime evidence for DNA analysis
Types of samples include semen, bloodspots, hair
roots, fingernail scrapings, dandruff, saliva,
skin cell, ear wax, bones, teeth, urine and feces
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Reliability of DNA profile technology
2. Positive and negative controls must be used
4. Forensic samples must be done in duplicate
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Evidence collection and preservation
Packages should be clearly marked with case
number, item number, collection date and
initialed across the package seal maintain
chain of custody
Stains on unmovable surfaces transferred with
sterile cotton swabs and distilled water
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Main problems with forensic DNA profiling
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Advances in DNA evidence
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Ethical, Legal and Social concerns about DNA
databanking
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