Forensics Test Revision

Forensics Test Revision

1. Blood

   • Plasma
     • Contains Substances
   • Red Blood Cells
     • Carry Oxygen
   • White Blood Cells
     • Blood Clotting
   • Platelets
     • Blood Clotting
   • Blood Groups
     • A
     • B
     • O
       • Can Only accept O
     • AB
       • Antigens found on the Surface of the Membrane

2. Finger Printing

   • Has a person touched a Surface?
     • Humans have oils in there skin
   • Can Be Identified By:
     • Chemical Spray
     • Powder Dusting
   • Whorls, Arches, Loops etc.

3. DNA

   • How do they use it?
     • 1. Extract the DNA
     • 2. Cut the the DNA into fragments
     • Electrophoresis
       • 3. Put into walls on an Agar Plate
       • 4. Apply an Electric Current
       • 5. The Fragments will move up and down the plate
   • Rigor Mortis
     • Stiffing of Joints and Muscles a few hours after Death.

4. Microscopes

   • Electron Microscopes
     • Picometers
     • In Black & White
   • Light Microscopes
     • Micrometers
     • In Colour
     • Only to x1000

Images and files in the map