How Does DNA Forensics Work?
Using DNA, forensic scientists can accurately identify individuals that are suspects or victims of a crime. They use DNA sequencing technology to compare DNA samples by profiling 13 regions of the genome. Samples of a person’s DNA can be obtained from blood, hair, bone and other parts of the body. First, the DNA must be extracted from an individual, such as in a crime scene, before scientists can further analyze it. Forensics experts then use sophisticated laboratory equipment to compare DNA samples. Markers are found in a sample by scientists that create DNA pieces, called probes, that bind to another DNA sequence inside the sample. These DNA probes form a series that forms a distinctive pattern for a particular individual. Therefore, forensic scientists can compare the profiles to determine if a suspect’s sample matches the evidence. The more probes that are used, the more accurate the identification will be, but if 2 samples are alike in 4 or 5 regions, then it is a likely match. Th
