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.
DNA: The Genetic Material. Althought DNA was first discovered in the late ninetheenth century it was not until the middle of the twentieth centruy that the role of DNA as the genetic material was established.n the other hand, if DNA were the genetic material, the opposite would be true. In their experiments, Avery et al. found that protease did not affect the ability of 'dead' S to transform R but DNAase did, therefore they concluded that the genetic material in transformation is most likely DNA.