DNA profiling is a technique used to identify individuals by the observing characteristic variations within their DNA.
DNA profiling is based on the principle that there are variations that exist between individuals between genes, which can be used to help identify an individual. These variations include:
Once DNA strands have been obtained they are treated with restriction enzymes that cuts at some point of the gene (which will cut at different lengths depending on the nature of the DNA sequence). This produces fragments of different lengths known as restriction fragment length polymorphisms. These fragments are separated out on gel electrophoresis and treated with a probe to identify specific bands.
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