Question #67a33

1 Answer
Paul G.
Jun 26, 2017

b

Explanation:

PCR (polymerase chain reaction) amplifies the sample (millions of copies).
DNA fingerprinting used to involved Restriction-Fragment-Length-Polymorphisms (RFLP's) cutting a DNA samples every time a specific sequence of base-pairs would exist. The result would be that the DNA of different people would be cut into different lengths of DNA, and DNA from the same person would be cut at identical positions.

The fragments are then run through an agarose gel through a process called gel electrophoresis that separates the DNA fragments by size, producing the familiar "DNA Fingerprint" observed in film and television.

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