What best describes the analysis of amplicon products in Endpoint PCR?

The analysis of amplicon products in Endpoint PCR is accurately described by the fact that it occurs after the PCR has run to completion. In Endpoint PCR, the thermal cycling process is finished before any analysis is conducted, typically involving techniques like gel electrophoresis or other forms of detection to assess the presence and quantity of amplified DNA products.

This method contrasts with Real-Time PCR, where data is collected during the reaction, specifically during the exponential phase, allowing for dynamic monitoring of the amplification process as it occurs. Advanced imaging techniques mentioned in other answers are not necessarily a trademark of Endpoint PCR analysis, as the primary assessment is straightforward, focusing on the final product post-cycling. The fundamental characteristic of Endpoint PCR lies in its approach of measuring the amplified products only after the PCR cycles are complete.