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)?