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youtube/watch?v=Wmrwj6DDt-4

http://www.youtube.com/watch?v=Wmrwj6DDt-4. What is this? . How did it all start?. First used on clay tables for business transactions in ancient Babylon Then used in China to sign documents in clay seals Fingerprints weren't used for identifying criminals until the 19th century (1800s)

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youtube/watch?v=Wmrwj6DDt-4

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  1. http://www.youtube.com/watch?v=Wmrwj6DDt-4

  2. What is this?

  3. How did it all start? • First used on clay tables for business transactions in ancient Babylon • Then used in China to sign documents in clay seals • Fingerprints weren't used for identifying criminals until the 19th century (1800s) • Now: Iphone 5S?

  4. How does fingerprinting work?

  5. How can you record fingerprints?

  6. Crime Scene Fingerprints • Visible Prints – impression on surface such as blood, dirt, clay • Latent Prints – sweat and oil reproduce fingerprints on glass, murder weapon • Can’t see Latent Prints with Naked Eye, only powder, lasers, or light source (which we will do later!)

  7. Another identification method • DNA analysis of blood, hair, skin

  8. What is DNA? • Deoxyribonucleic acid • ZzZzzzzzZZ

  9. What does DNA really mean??? • It codes everything for your body to do

  10. What do we use DNA for? • Fossils • Paternity tests • Trace relatives • Health for fetus • Criminal investigation • Identify new species • Create family trees • Medicine!

  11. What can twins NOT share? • Fingerprints! • They can share identical DNA.

  12. QUESTIONS • TRUE or FALSEFingerprints are the tiny ridges, whorls and valley patterns on the tip of each finger. • Which is not a use DNA for?A. Family treesB. Dehydration of fruit C. Criminal InvestigationD. Medicine • TRUE or FALSETwins have the same Fingerprints.

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