DNA fingerprinting: a ________________ to identify and

evaluate the ______________ in a person's cells.

❖ Used for:

▪ Suspect Identification

▪ Identifying ____________________ Species

▪ Paternity Tests

Making a DNA Fingerprint

▪ Gel Electrophoresis: a laboratory method used to

__________________ segments of __________ according to

________________.

Steps of Gel Electrophoresis:

1. Use _____________________ _______________________ to cut or separate fragments of

DNA.

2. Place segments of ________________________ charged DNA into a _________.

3. Shock the ___________.

4. Negative fragments of DNA are attracted to and move towards the

______________________ end of the gel.

5. Smaller DNA fragments go the _______________________ through the gel.

4. Complete the questions about each DNA fingerprint listed below. [5 points]

A. Label the positive and negative ends of the gel.

B. Whose DNA matches the blood stain found at the

crime scene?

C. Where would the smallest pieces of DNA be found

on the fingerprint (top or bottom)?