On what basis do you select DNA targets for PCR and what determines the specificity of PCR? Thanks!

It helps to define your abbreviations.

Since this is not my area of expertise, I searched Google under the key words "DNA PCR target" to get these possible sources:

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http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=516305
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http://www.animalgenome.org/edu/doe/pcr.html

In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search.

I hope this helps. If not, continue the search or repost your question in clearer terms (at least for me). Thanks for asking.