Which technique is commonly used for DNA profiling?

Gel electrophoresis is commonly used for DNA profiling because it allows for the separation and visualization of DNA fragments based on their size and charge. In the context of DNA profiling, individuals' DNA samples can be amplified using techniques like Polymerase Chain Reaction (PCR) and then subjected to gel electrophoresis. This process creates a distinct pattern of bands for each individual, as the length of DNA fragments from different genetic markers will vary. These patterns can then be compared to identify genetic similarities and differences between individuals.

While techniques such as Sanger sequencing and PCR are important in the broader context of molecular biology and genetics, gel electrophoresis is specifically crucial for the analysis and interpretation of DNA fragments for profiling purposes. CRISPR gene editing serves a different role in manipulating genes rather than profiling them, making gel electrophoresis the most relevant choice for the specific task of DNA profiling.