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SlideshowReport

The cladistic approach from molecular genetic data

Description
Three possible evolutionary trees for the evolution of a short DNA sequence are shown, but many more are possible. Changes in nucleotide sequence are shown along each tree. According to the principle of parsimony, tree number 3 is the most likely choice because it requires only five mutations. When reconstructing cladograms based on long genetic sequences, researchers use computers to generate trees with the fewest possible genetic changes.
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