1. Be a DNA analyst Think and discuss
Miss Taken felt that she needed more evidence to identify which of the suspects could have damaged her classroom and ruined her bouquet of flowers.
The scarf left in her classroom provided many clues (hairs, dust, pollen and blood) but modern forensic science might provide evidence that would enable her to know if one of her suspects was guilty.
We all have different DNA so maybe DNA analysis could help.
  What is DNA?
  Where is it found?
Why do we have DNA?
  Where are we likely to find DNA at a crime scene?
   How can we find out whose DNA has been left at a crime scene?
   Can DNA analysis be a way of tying a person to the scene of a crime beyond a
shadow of a doubt?
Can we rule out suspects using DNA analysis?
You will now carry out the experiment to analyse DNA from the crime scene and from the suspects.
Think and discuss