DNA profiling

electrophoresis:

• dna fragments form each person placed inside different wells, at anode end

• electric current passed thru gel

• dna fragments = negatively charged, so they move towards cathode

• smaller fragments travel faster and move further

• dna fragments are now separated

• invisible binding pattern now shown

dna profiling:

• obtain dna from individual

• digest dna with restriction enzymes - results in fragments of different lengths

• separate using gel electrophoresis

• banding pattern is seen

• compare to sample