More DNA

08 May

To answer a couple of questions that were asked in the comments section let me say that DNA profiling was developed in 1984, first entered a US courtroom in 1987, and by the mid-1990s was quite commonly used in criminal investigations. In the late 1990s the techniques of PCR and STR analysis, the combination of which allowed for profiles to be developed from extremely small samples, came into common use and currently these systems are automated in many of the more sophisticated labs. There is no special technique or equipment required in analyzing the so-called touch DNA as compared to any other DNA sample. It just requires that the DNA sample be of good quality and not necessarily of large quantity. The PCR technique allows the technician to produce as much identical DNA as is needed from the tiniest of samples, theoretically even a single cell.


Posted by on May 8, 2009 in DNA


2 responses to “More DNA

  1. Cher'ley

    May 9, 2009 at 5:35 am

    Seems like we’d have a lot less crime with all of these new techy ways to identify criminals.


  2. Jenni Holbrook

    May 9, 2009 at 5:39 am

    Hey Doug! This is great stuff! Thanks so much for doing this. You’re the best!



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