What are PCR products combined with for accurate analysis?

PCR products are combined with allelic ladders for accurate analysis because allelic ladders serve as a standard reference for determining the sizes and relative quantities of PCR products. An allelic ladder consists of a mixture of PCR products that represent known alleles at specific loci, allowing for precise comparison against experimental samples. By using an allelic ladder, researchers can effectively identify the presence and size of target alleles, ensuring the accuracy and reliability of the genotyping results.

In contrast, primers are essential for initiating the PCR process but are not used for analysis after the fact. Control samples are also crucial in validating the PCR process; however, they are typically used to ensure that the amplification is successful rather than for comparing product sizes. Synthetic DNA is sometimes utilized for calibration or in specific experimental designs but does not serve the same purpose as allelic ladders in the analysis phase.