Molecular phylogenetics /məˈlɛkjʊlər faɪlɵdʒɪˈnɛtɪks/ is the analysis of 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. Molecular phylogenetics is one aspect of molecular systematics, a broader term that also includes the use of molecular data in taxonomy and biogeography.
Read more about Molecular Phylogenetics: History of Molecular Phylogenetics, Techniques and Applications, Theoretical Background, Limitations of Molecular Systematics