Question

dna evidence that is old or in poor condition can sometimes be salvaged and analyzed by using ______. pcr amplification rna gel electrophoresis dna from the mitochondria instead of the nucleus

Explanation:

PCR (Poly - merase Chain Reaction) can amplify small amounts of DNA. Old or poorly - conditioned DNA may be present in small quantities. PCR can increase the amount of DNA available for analysis, making it possible to salvage and analyze such samples. RNA is different from DNA and not a method for salvaging old DNA. Gel electrophoresis is used for separating DNA fragments, not for salvaging old DNA. Using mitochondrial DNA instead of nuclear DNA is not a general method for salvaging old or poor - condition DNA in the context of this question.

Answer:

PCR amplification