1. DNA & Forensic Evidence Lab

2. DNA & Forensic Science Lab
Predictions:
Is DNA found in the food we eat?
Where exactly do you think DNA is located?
Can DNA be extracted?
Why is DNA extraction an important skill for a forensic scientist?

4. How does forensic id work?
Every species has their own DNA sequence
Scan 13 different regions (loci) when creating a human DNA profile
Human DNA Profile=DNA Fingerprint

5. Examples of DNA uses in forensic science
DNA left at a crime scene
Exonerate persons who are wrongfully accused of crimes
Identify crime and catastrophe victims
Establish paternity and other family relationships

6. Is dNA effective in id of persons?
DNA id is effective if used intelligently.
Example: Assume that type O blood is found at crime scene. Type O occurs in about 45% of Americans. If investigators type only for ABO, finding the suspect with type O blood doesn’t reveal much.
It’s usually a chain of biological and physical evidence like hair, footprints that leads to the making of the match.

7. What are some of the dna technologies used in forensics?
RFLP Restriction Fragment Length Polymorphism
PCR Analysis Polymerase Chain Reaction
STR Analysis Short tandem repeat technology
Mitochondrial DNA Analysis *related to the DNA loci passed on from the mother
Y-chromosome analysis *passed on loci from the father

8. Interesting Uses of DNA in forensic Identification
Identifying September 11th victims
Migrational Patterns of Human throughout history
DNA Banks for Endangered Species
Poached Animals

9. Materials & Function
Strawberry: large genome due to the fact that it is an octoploid (8 times the amount of genetic info.)
Soap: dissolve the phospholipid bilayers of the membrane and organelles (plant cell)
Salt: break up the protein chains that bind the nucleic acids
Ethanol: is kept cold on ice because the DNA is insoluble making it easy to separate from the beaker.

10. conclusion
Online is posted the conclusion worksheet. Answer all questions on your own sheet of paper. Attach your answers to the rest of your lab report.
Lab report due Wednesday.