What is a characteristic of STR analysis?

STR analysis, or Short Tandem Repeat analysis, is indeed a refined form of PCR (Polymerase Chain Reaction) technology. This method takes advantage of the ability of PCR to amplify specific regions of DNA, allowing for the detection of these short repeats that vary among individuals. STRs are frequently used in forensic science because they are highly polymorphic, meaning that the variation in these regions can provide a high degree of discrimination between individuals.

This amplification process allows even small amounts of DNA to be analyzed, making STR analysis highly valuable in forensic contexts where sample sizes may be limited. The technique is efficient and can be adapted for various types of biological materials, such as saliva, hair, and other tissues, not just blood, which establishes its versatility. As a direct application of PCR, STR analysis enhances speed and accuracy in DNA profiling, solidifying its essential role in forensic investigations.