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it can be as little as a single cell if using low copy number (LCN) analysis however if you are looking for results that are a little more reliable its ussially over 1 nano gram, that's using STR (short tandom repeate) analysis. if using something like RFLP (ristriction fragment length polymorphism) it would be alot more then that, however that technique is hardly used anymore. visually repisented the smallest amount of DNA to produce an STR profile is the size of a full stop .

i hope this helps

thegreatmizuti

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