What does dna typing mean?

DNA typing is a DNA analysis technique to identify biological individuals by comparing molecular genotyping.

DNA typing technology can provide specific autoradiography bands for each individual through restriction enzyme digestion, electrophoretic separation and repeated DNA hybridization with isotope markers.

In the mid-1980s, DNA typing technology began to be used in forensic identification. A drop of blood, a wipe of saliva and a hair, as long as they are human cells, can be used for DNA analysis and identification. 1985 successfully identified a British immigration dispute case for the first time. 1986 found and identified the suspect from thousands of people in a criminal case of rape and murder for the first time. DNA typing technology has made a qualitative leap since then.

Forensic application of DNA typing

Criminal investigation. DNA typing technology is a new means of investigation. In the old era of investigation technology, incomplete or unclear fingerprints could not identify the exact identity of the fingerprint owner, so they lost their function. Through DNA typing technology, the exact identity of the fingerprint owner can be determined by analyzing the DNA of oil, sweat, dander and other things left by fingerprints, thus helping to analyze the case.

Paternity test. Since jeffries and others first identified the mother-child relationship in an immigration dispute in 1985, DNA fingerprinting technology has been used for paternity testing for more than 20 years. Representative reports are as follows: In the process of identifying an unknown corpse, experts successfully identified the nameless corpse by comparing the DNA extracted from the residual blood of the decomposed corpse with the DNA of the presumed victim's parents.