DNA detection refers to the process of identifying and analyzing the genetic material found in living organisms. This technique is commonly used in various fields, including forensics, medicine, and biology, to determine genetic relationships, diagnose diseases, and identify individuals. Methods for DNA detection include polymerase chain reaction (PCR), which amplifies small amounts of DNA, and gel electrophoresis, which separates DNA fragments based on size. These techniques allow scientists to visualize and study specific DNA sequences, making it possible to detect genetic variations and mutations that may be linked to certain conditions or traits.