Often only small amounts of DNA are found at a crime scene. Which technique uses an enzyme to replicate DNA regions from a small sample of DNA for use in DNA fingerprinting? VNTRs (variable tandem repeats) PCR (polymerase chain reaction) analysis STRs (short tandem repeats) mtDNA (mitochondrial DNA) analysis

PCR, or polymerase chain reaction, is the superhero of DNA analysis! It enables scientists to take tiny amounts of DNA and amplify them, creating millions of copies from just a few strands. This is crucial in forensic science, as it allows for thorough analysis even when only trace amounts are available, making the difference between solving a case or leaving it cold. On the flip side, STR (short tandem repeats) analysis is a specific technique often used in conjunction with PCR. STRs focus on repeating sequences within the DNA and are key to DNA fingerprinting. They are highly variable among individuals, making them perfect for creating unique DNA profiles that can help identify suspects or victims in crime scenes. So, it's all about working with what little you’ve got and turning it into something big!