Question

when researchers wish to make multiple copies of a gene without first inserting it into a bacterium, they employ
multiple choice
gel electrophoresis
contifugation
reproductive cloning
pcr (polymerase chain reaction)

Explanation:

Gel electrophoresis is used to separate DNA fragments. Conjugation is a form of genetic transfer in bacteria. Reproductive cloning aims to create an organism. PCR (polymerase chain reaction) is specifically designed to amplify (make multiple copies of) a specific DNA segment (like a gene) without inserting it into a bacterium first.

Answer:

PCR (polymerase chain reaction)