What is the difference between individual characteristics and class characteristics?

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."

her next move would be to use agarose gel electrophoresis to separate the dna molecules of varying length and create a dna fingerprint.