DNA sample

Cindy Coffman, left, with the Howard County Public School System instructs Shelby Hall, 13, how to put a DNA sample into an agarose gel which allows one to see differences between DNA samples. This method is used for medical and forensic tests.

( Algerina Perna, Baltimore Sun / March 17, 2013 )

Cindy Coffman, left, with the Howard County Public School System instructs Shelby Hall, 13, how to put a DNA sample into an agarose gel which allows one to see differences between DNA samples. This method is used for medical and forensic tests.

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