Question

What does polymerase chain reaction (PCR) do?

O
A. Makes more copies of a sample of DNA
O
B. Provides an overall picture of a person's chromosomes
O
C. Cuts a DNA sample into fragments
O
D. Separates DNA fragments by size

Answer 1

Makes more copies of sample of DNA

Step-by-step explanation:

a p e x

Answer 2

A. makes more copies of a sample of DNA