Question

how does the polymerase chain reaction make dna fingerprinting more reliable?
a. it allows scientists to use bacteria to produce copies of dna.
b. it allows scientists to use rna instead of dna for testing.
c. it allows scientists to use transgenic organisms in testing.
d. it allows scientists to quickly make many copies of dna.

Explanation:

The polymerase chain reaction (PCR) is a technique that amplifies DNA. By quickly making many copies of DNA, there is more material for analysis in DNA fingerprinting, reducing errors from low - quantity samples. Options A, B, and C are incorrect as PCR does not involve using bacteria to produce DNA copies (A), using RNA instead of DNA (B), or using transgenic organisms (C).

Answer:

D. It allows scientists to quickly make many copies of DNA