The magic of DNA technology

Old saying, "Long Long-sheng, Feng Feng-sheng, the son of a rat holes will be." All the biological characteristics of DNA molecular structure by the decision. Biological differences between species, due to the genome sequence differences in rank due to differences in species, is due to the genome structure of the gene expression differences. In short, is the number of nucleotide differences in the number of permutation and combination and resulted in different species. Now shows that only 0.1 percent among people% of the genetic differences between chimpanzees and human genes, only 1%% of the difference. The use of the characteristics of the fight against crime, mainly: on-site analysis can be extracted from animals, plants and micro-organisms as well as the DNA, to determine the scope of the investigation, that tracking suspects.

1985 British biologist at the University of Leicester in the study, Professor Li克杰弗里斯gene variant gene was found on some small structures, which are sufficient to distinguish between the different structure of the individual. As a result, he thought of the possibility of the use of the structural differences to distinguish between different people, and to draw the world's first piece of DNA fingerprinting. The DNA identification, the police around the world attach great importance to its traditional biological forensic examination can only rule out suspects, not identified a suspect technology to a new stage. At present, the technology has been most countries in the world available.

For more than 20 years, DNA identification techniques have been establishing a DNA fingerprint, PCR amplification and RFLP analysis of mitochondrial DNA sequencing and other major technology. These new technologies and new ways to test genetic markers of increasing the information provided by the ever-increasing, so that the test toward fast, sensitive, accurate and trace, automation and quality requirements of the samples are becoming less and less development, more Good to meet the various needs of the criminal investigation, and so on.