Question

1. how do scientists create many copies of a dna sequence?

dna sequencing
cloning
electrophoresis
pcr

Explanation:

DNA sequencing determines the order of nucleotides in DNA. Cloning can create copies of organisms or large - scale DNA constructs. Electrophoresis separates DNA fragments by size. PCR (Polymerase Chain Reaction) is a technique specifically used to amplify (create many copies of) a DNA sequence.

Answer:

D. PCR