1 / 12

CODIS – Combined DNA Index System

CODIS – Combined DNA Index System. CODIS STRs and Probability. 1/X = value 1/X = 0.097 SOLVE FOR X X = 1/0.097 = 10.3 This means the DNA matches one in 10.3 people Think about class evidence…how do we narrow down the pool of possible suspects?. Where is DNA found?.

december
Download Presentation

CODIS – Combined DNA Index System

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. CODIS – Combined DNA Index System

  2. CODIS STRs and Probability 1/X = value 1/X = 0.097 SOLVE FOR X X = 1/0.097 = 10.3 This means the DNA matches one in 10.3 people Think about class evidence…how do we narrow down the pool of possible suspects?

  3. Where is DNA found? • DNA is contained in blood, semen, skin cells, tissue, organs, muscle, brain cells, bone, teeth, hair, saliva, mucus, perspiration, fingernails, urine, feces, etc. • http://www.dna.gov/basics/ THIS IS NUCLEAR DNA!

  4. Two types of DNA • Nuclear DNA (inside nucleus) • Mitochondrial DNA (mtDNA) • Analysis of mtDNA is done when RFLP and STR cannot be used on NUCLEAR DNA

  5. Nuclear DNA • Nuclear DNA: • Found in nucleus of cells • Contains 23 chromosome pairs • Each parent contributes half

  6. Mitochondrial DNA • Mitochondria are found in all cells of the body • Provides 90% of energy our bodies need to function • Contain bits of DNA passed down through generations • Hundreds of thousands of mitochondria per cell!! • What are the benefits? • What are the limitations?

  7. Nuclear vs. Mitochondrial DNA

  8. Mitochondrial DNA • Used in identifying remains • Generous amount present in bones • Shows maternal lineage matches (will be identical if related through the mother)

  9. In the NEWS: Sandringham • http://www.metro.co.uk/news/886331-sandringham-murder-body-could-be-missing-teenager-say-police • http://www.telegraph.co.uk/news/uknews/crime/8998481/Sandringham-body-identification-will-take-further-three-days.html

  10. Last March • Royalty-obsessed Robert James Moore found dead • TOD ~ up to 3 yrs

  11. Missing Persons: Dung Beetle Biologist

More Related