Part 2
DNA-Typing AnalysisThe blood-typing evidence did not clearly reveal whether the bloodstainsbelonged to the missing victim. So, investigators turned to a newer technique called DNA fingerprintingor DNA typing. The DNA sequence of human genes (DNA that codes for proteins) follows fairly regularpatterns; however, the DNA sequences between genes (i.e. non- coding DNA) differ greatly amongindividuals. Scientists understand how to identify and analyze these special sequences, so they can tell iftwo DNA samples probably came from the same person. Since DNA is inherited from each parent, anindividual shares patterns within these sequences with his or her parents. Therefore, scientists can alsotell whether or not two samples came from individuals who are related.
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