Activity 3.3 - Analyzing the DNA

Learning Aims:

    Applying information on DNA to find out if a suspect is guilty or not guilty
      Materials:
      Pen and paper
      Suggestions for use:
      • Students have to answer some questions on DNA profiles.
      • Evaluate this in a classroom discussion, use this to check if the information so far is clear to the students.
      • Give extra information for those students who do not master the topic so far.

      Example of an answer:

      • The frequency of feature 19 on locus D18S51 is 0.039. This means that from 100 persons, 3.9 will have this specific property.
      • The sum of all the possibilities has to be 1.0 (or 100%).
      • For the individual properties, the probability is

      p = 0.067 (VWA 14)

      p = 0.141 (D18S51 17) and

      p = 0.011 (D21S11 32)

      This means the probability of this mix is 0.067 * 0.141 * 0.011 = 0.000104 (that is 0.0104 %)
      Possible questions:

        Students can make similar questions (with answers) based on the profiles given to them.