The Longest Common DNA Subsequence Model implements a widely used method for DNA comparison by searching two DNA sequences for matching subsequences.  The more two DNA sequences have in common, the more likely they are to have similar functionality.  The simulation draws a grid whose components are described by nucleotides in each DNA sequence.   The algorithm moves through the grid and weighs each component based on the agreement between the two nucleotides.  Components with matching nucleotides are weighed heavier than those whose nucleotides don't match.  Then the algorithm moves through the grid again and finds the heaviest weighted path.  This path results in the longest common sub-sequence. 

The Longest Common DNA Subsequence Model  is distributed as a ready-to-run (compiled) Java archive.   Double clicking the jar file will run the program if Java is installed.  You can modify this simulation if you have EJS installed by right-clicking within the map and selecting "Open Ejs Model" from the pop-up menu item.

Please note that this resource requires at least version 1.7 of Java (JRE).