Name _____________________________________ Pd ____ Date ________________________
DNA Profiling Virtual Lab
Go to the following link, http://www.biotechnologyonline.gov.au/popups/int_dnaprofiling.html , complete the
criminal investigation, investigation of the will, and answer the questions. Read the introductory slide and answer
the pre-lab questions before running the virtual lab.
Pre-Lab Questions
1. What are the DNA banding patterns sometimes called?
2. What is the lab procedure that creates the banding patterns from the DNA evidence?
3. How many banding sites are tested?
4. How many must match in criminal investigations?
5. How many must match in a paternity test?
Criminal Investigation
6. Why are the electrophoresis gel and electrical current necessary to create a DNA profile?
7. Whose blood was at the crime scene? How many bands matched?
8. Explain how you matched the blood from the crime scene to one of the known blood samples.
9. Whose hair sample was at the crime scene? How many bands matched?
10. What can you conclude about the suspect? Why did you come to this conclusion?
Investigation of the Will
11. Who are Percy Junior’s father and mother? How can you tell?
12. Who are Ann’s father and mother? How can you tell?
13. Who are Alistair’s father and mother? How can you tell?
14. Why don’t Percy, Jr. and Ann have the same DNA profile?
15. How many matching bands do they have?
16. How many matching bands do Percy, Jr. and Alistair have?
17. How many matching bands do Ann and Alistair have?
Warp-Up
18. Why do you have to have more matching bands in a criminal investigation than in a paternity investigation?
19. Can you use DNA to tell if two people are siblings or half-siblings? Explain.