Overview: This article describes practical applications of phylogenetics, focusing on intriguing cases ripe for deployment in classrooms--like using phylogenetics to investigate crimes. This article appears at SpringerLink. Author/Source: Evolution: Education and Outreach Grade level: 9-12 Time: 30 minutes Teaching tips: This article is written for teachers and comes with links to additional examples, supplementary information, and classroom tips. It is also available as a pdf at http://www.springerlink.com/content/n7309n36k4j60487/fulltext.pdf Concepts: Present-day species evolved from earlier species; the relatedness of organisms is the result of common ancestry. Scientists use the similarity of DNA nucleotide sequences to infer the relatedness of taxa. As with other scientific disciplines, evolutionary biology has applications that factor into everyday life. Evolutionary trees (i.e., phylogenies or cladograms) portray hypotheses about evolutionary relationships. Teacher background: Classification/Phylogenetics

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