The History of DNA

Timeline created by km.agostini
  • Watson and Crick discover double helix structure

    James Watson and Francis Crick win the race to discover the structure of DNA after seing Rosalind Franklin's x-ray crystallography photos.
  • Ray White describes first polymorphic RFLP marker

    RFLPs (restriction fragment length polymorphisms) are strands of DNA that repeat over and over again. Each person has a unique number and pattern of RFLPs.
  • Kary Mullis develops PCR

    The discovery of PCR (polymerase chain reaction) allowed small amounts of DNA to be replicated, producing millions of copies in a few short hours.
  • Alec Jeffreys develops DNA fingerprinting technique

    Alec Jeffreys discovers that each person has a unique genetic fingerprint that is a combination of their parents', after noticing that one of his lab assistants inherited bands from each of her parents.
  • DNA casework started at FBI

    The FBI begins to use DNA evidence as a means of convicting criminals.
  • First use of STR in DNA analysis

    STR polymorphisms are shown to have an extended life and more reliability for identifying individuals than VNTRs.
  • FBI launches Codis Database