Phylogenetic trees represent evolutionary relationships

Phylogenetic trees represent evolutionary relationships -...

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Phylogenetic trees represent evolutionary relationships Figure 2: The parts of a phylogenetic tree . The taxa in this tree are "human", "mouse", and "fly" (all of which have had their full genomes sequenced). Several nodes are indicated, such as the "fly" taxon node and an internal node that represents the common ancestor of mice and humans. The root is indicated at left, representing the common ancestor of all three taxa listed. Phylogenetics is the scientific discipline concerned with describing and reconstructing the patterns of genetic relationships among species and among higher taxa. Phylogenetic trees are a convenient way of visually representing the evolutionary history of life. These diagrams illustrate the inferred relationships between organisms and the order of speciation events that led from earlier common ancestors to their diversified descendants. A phylogenetic tree has several parts, shown in Figure 2 . Nodes represent taxonomic units, such as an organism, a species, a population, a common ancestor, or even an entire genus or other
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This note was uploaded on 11/14/2011 for the course BIO BSC1010 taught by Professor Gwenhauner during the Fall '10 term at Broward College.

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Phylogenetic trees represent evolutionary relationships -...

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