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questions about DNA fingerprinting

Genetics as it applies to evolution, molecular biology, and medical aspects.

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questions about DNA fingerprinting

Postby tracyliu » Thu Oct 21, 2010 11:09 am

In DNA fingerprinting, when u amplify the STRs by PCR, how how do you control the elongation of the primer so that the elongation stops exactly at the end of the STR?
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Postby JackBean » Thu Oct 21, 2010 11:28 am

exactly as in any other PCR - you don't. But by use of two primers, you exponentially amplify those short fragments, while the longer grow only linearly. Look up to PCR principle ;)

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