DNA fingerprinting

DNA fingerprinting

use of repetitive sequences (non-coding sequences) to identify the owner of a DNA molecule

In what ways is DNA fingerprinting useful?

crime scene investigation, paternity tests, tracking migration

key aspects of DNA fingerprinting

repetitive sequences that are unique to individuals unless they are identical twins

other names for repetitive sequences?

tandem repeats, satellite DNA

3 steps of DNA fingerprinting

PCR (polymerase chain reaction) makes copies of DNA to be profiled. restriction enzymes act like scissors and look for specific repeated sequences and cut DNA at that sequence leaving DNA in fragments. then Gel phoresis

Gel Electrophoresis

places fragments on a get and uses electric current to separate.Goes from negative to positive, crime scene DNA fragments are compared to DNA of suspects,