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Molecular phylogeny is used to analyze hereditary differences in DNA sequences between organisms in order to determine their evolutionary relationship.

Every living organism carries DNA; closely related organisms share similarities in their DNA, while DNA from more distantly related organisms is more dissimilar. DNA found in conserved sequences is expected to accumulate
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over time. Assuming this occurs at a constant rate in these sequences, scientists can date
Select Option emergencedivergenceallegiance
between different organisms. Molecular phylogeny uses the data obtained in order to build a phylogenetic tree showing the probable evolution of various organisms (see phylogenetic tree of West Nile virus strains).

Rossini, Giada, and Fabrizio Carletti. "Figure 1 - Phylogenetic Analysis of West Nile Virus Isolates, Italy, 2008–2009 - Volume 17, Number 5-May 2011 - Emerging Infectious Disease Journal - CDC." Emerging Infectious Diseases 17.5 (2011): n. pag. Phylogenetic Analysis of West Nile Virus Isolates, Italy, 2008–2009. Cdc.gov, 14 Aug. 2011. Web. 02 Apr. 2016. http://wwwnc.cdc.gov/eid/article/17/5/10-1569-f1.

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