Biology, 19.07.2019 23:30 randkphillipsp5v56r

Why was it difficult to use dna as evidence in a crime before pcr was invented? a. you need many copies of dna for dna fingerprinting. b. pcr is the only way to cut dna into separate pieces. c. you need to be able to produce mrna from dna. d. it was impossible to copy dna before pcr was invented.

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Why was it difficult to use dna as evidence in a crime before pcr was invented? a. you need many co...

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