BIOLOGY. FORENSIC MOLECULAR BIOLOGY. Forensic labs are inundated with requests for forensic biology cases due to the power of DNA technology. DNA: Deoxyribonucleic acid is a double-stranded helix of nucleotides, which carries the genetic information of a cell.
The PCR technique allows the forensic scientist to replicate a DNA molecule many times.
In a three-hour run (28 cycles), millions of copies of specific target DNA can be produced.
PCR technology meets the needs of the forensic crime lab, in that it is sensitive, safe, fast, robust, and economical.
Leucomalachite green (LMG) is a color change reagent oxidized by peroxide that yields a colored reaction product.
If blood is present, LMG produces a blue-green color when the peroxide is added.
Visual examination of stain
Color test for seminal fluid
Prostate specific antigen (PSA)
Visualization of PSA/antibody interface
Microscopic visualization of sperm
1. Pubic combings.
2. Pubic hair standard/referencesamples.