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DNA Fingerprinting

DNA Fingerprinting. By: Tyler Wilson. What is DNA Fingerprinting?. The chemical structure of everyone's DNA is the same. The only difference between people is the order of the base pairs. There are so many millions of base pairs in each person's DNA that every person has a different sequence.

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DNA Fingerprinting

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  1. DNA Fingerprinting By: Tyler Wilson

  2. What is DNA Fingerprinting? • The chemical structure of everyone's DNA is the same. The only difference between people is the order of the base pairs. There are so many millions of base pairs in each person's DNA that every person has a different sequence. • Using these sequences, every person can be identified solely by the sequence of their base pairs. • These patterns do not, however, give an individual "fingerprint," but they are able to determine whether two DNA samples are from the same person.

  3. The History • DNA fingerprinting was invented in 1984 by an English Professor named Alec Jeffreys • It has helps solve crimes in the court of law since 1987

  4. How is it done? • A DNA fingerprint is constructed by first extracting a DNA sample from body tissue or fluid such as hair, blood, or saliva. • Special enzymes cut the DNA strands in specific places. • The segments are marked with probes and exposed on X-ray film, where they form a characteristic pattern of black bars—the DNA fingerprint.

  5. A Picture of the First DNA Fingerprinting

  6. Bibliography http://protist.biology.washington.edu/fingerprint/dnaintro.html http://www.accessexcellence.org/RC/AB/BA/DNA_Fingerprinting_Basics.html http://encarta.msn.com/encyclopedia_761579857/DNA_Fingerprinting.html http://www.sciencemuseum.org.uk/on-line/genes/images/1-3-4-3-1-1-0-0-0-0-0.jpg http://genome.wellcome.ac.uk/doc_wtd020877.html

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