Molecular Phylogenetics

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Molecular Phylogentics is the branch of phylogeny that analyses hereditary molecular differences, mainly in DNA sequences, to gain information on an organism's evolutionary relationships.   The result of a molecular phylogenetic analysis is expressed in a phylogenetic tree. Phylogenies are important for addressing various biological questions such as relationships among species or genes, the origin and spread of viral infection and     the demographic changes and migration patterns of species. Phylogenies have permeated nearly every branch of biology, and the plethora of phylogenetic methods and software packages that are now available may seem daunting to an experimental biologist.