Which process aids in the replication of DNA sequences during genetic analysis?

The Polymerase Chain Reaction (PCR) is the correct answer because it is a widely used technique specifically designed to amplify DNA sequences. In genetic analysis, PCR enables researchers to create millions of copies of a particular DNA segment from a small sample, allowing for detailed study and analysis. The process involves repeated cycles of denaturation (where the DNA strands separate), annealing (where primers bind to the specific target sequences), and extension (where DNA polymerase synthesizes new DNA strands). This amplification is crucial not only for analyzing genetic material but also for applications such as cloning, sequencing, and analysis of genetic mutations.

Each cycle of PCR exponentially increases the amount of target DNA, making it feasible to study even minute quantities of genetic material. In contrast, the other processes listed, such as gene editing and gene therapy, focus on modifying existing DNA or introducing new genes rather than the amplification of DNA sequences. RNA interference operates by silencing gene expression rather than replicating DNA. Therefore, the ability of PCR to replicate DNA sequences makes it an essential tool in genetic analysis.