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Why is DNA evidence more useful as exclusionary evidence than for positive identification of a suspect?

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7- Why is DNA evidence more useful as exclusionary evidence than for positive identification of a suspect?

8- Give the DNA sequence for the template strand that gives rise to the following sequence gel, prepared using the sanger method with a radioactive label at the 5' end of the primer.

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Why is DNA evidence more useful as exclusionary evidence than for positive identification of a suspect?

Solution: When you digest DNA with restriction enzymes, you create millions of fragments of all various sizes. You then separate these out on a gel and probe the gel with a particular radioactive probe to highlight bands of interest on an autoradiogram. Many bands appear on these autoradiograms which may appear to be identical but aren't identical at all. They just happen to be of the same size, and therefore, ...

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