The polymerase chain reaction has revolutionized genetics because
a) it is capable of making copies of dna with very little starting material.
b) it is capable of making virtually unlimited copies of dna for study.
c) it is capable of making large numbers of dna copies very quickly. all of these

All of these

Explanation:

The polymerase chain reaction (PCR) revolutionized the field of molecular biology because PCR uses a small amount of DNA as a template.Paired with two primers which side to the target sequence, nucleotides, and thermostable DNA polymerase amplifies a specific region of DNA. In this way a large amount of DNA is obtained from a very small sample.

answer; i believe the answer is (polygenic inheritance;