Virus and spyware definitions are files that act like an encyclopedia of known malicious software, including viruses, spyware, and other potentially unwanted software.
Highly accurate DNA parental testing became available in the 1980s with the development of RFLP. In the 1990s, PCR, developed in 1983, became the standard method for DNA parental testing. A simpler, faster, and more accurate method of testing than RFLP, it has an exclusion rate of 99.99% or higher.
1 1920 - Chromosomes are proposed as the mechanism by which inherited characteristics are passed on. 2  1944 - DNA is first connected to the inheritance of traits. 3  1951 - The first sharp X-ray diffraction photographs of DNA are obtained. 4  1953 - Crick and Watson describe the structure of DNA. 5  1956 - DNA is made artificially.