Genetic Fingerprinting

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  • Created by: Fatima
  • Created on: 10-06-13 15:31

About 90% of human DNA = non-functional DNA. They vary in length but consists of bases, 20-40 bases long, repeated many times. The number of repeats is different in each individual. This unique non-coding regions of DNA are call SHORT-REPEAT TANDEMS or HYPER-VARIABLE REGIONS. 

The technique of DNA fingerprinting

1.The DNA is extracted and cut into fragments using restriction enzymes

2. The DNA fragments are seperated by ELECTROPHORESIS. They are placed on one end of a trough, containing gel and exposed to an electric currect. As DNA is negatively charged it moves towards the positive terminal. The smaller the DNA fragment, the…

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