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Ostrovityanka [42]
3 years ago
6

why is PCR a necessary step in the analysis of a DNA sample taken from a crime scene A: the sample yields very little DNA B: the

sample may be contaminated C: the sample undergoesdegradation D: the sample may not provide an accurate sequence
Biology
1 answer:
kumpel [21]3 years ago
8 0
The answer is A. The sample from a crime scene does not have enough DNA to perform forensics tests such as DNA matching. PCR -polymerase chain reaction - is used to amplify the DNA to required amount. Each cycle of PCR amplifies DNA two-folds
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