Unit 11 Lesson 2

DNA Fingerprinting Gel electrophoresis: a process used to separate DNA fragments of an organism. (Electro= using electricity Phoresis= to move across) Electricity is used to move the DNA across or through a gel. DNA Fingerprinting is used to solve crime scenes and in determining the parents of a child (paternity tests).

DNA Fingerprinting (continued)  DNA can be used like fingerprints to identify a person.  Any cell or fluid can be analyzed (blood, hair, skin, fingernail, urine, etc)  Used in paternity tests to determine the mother or father of a child.

Gel Electrophoresis

Steps: 1.Enzymes cut DNA samples 2.The cut DNA samples are placed in a gel 3.An electric voltage moves the DNA fragments across the gel 4.The smaller pieces of DNA travel the fastest 5.A trail is left for each sample. 6.The trail can be matched to determine if someone is guilty of a crime. Gel Electrophoresis Gel Electrophoresis Go to the underlined link and click play. You will be able to complete a simulation of Electrophoresis.

Gel Electrophoresis

Picture of DNA Fingerprint

Who is the criminal??? The DNA from the scene matches Dino Online Images. Access Excellence. 13 May