Learn about the logic behind phylogenetic trees and how to build a tree using data about features that are present or absent in a group of organisms.

In this article, we'll take a look at phylogenetic trees, diagrams that represent evolutionary relationships among organisms. We'll see exactly what we can (and can't!) infer from a phylogenetic tree, as well …

Constructing a phylogenetic tree involves hypothesizing evolutionary relationships among species based on observable traits and genetic evidence. By practicing parsimony, we aim for the simplest …

Based on the phylogenetic tree above, what species is most related to the blue whale?

Learn about phylogenetic trees and how to interpret them to determine which species are most related.

Test your knowledge of phylogeny!

A phylogenetic tree, also known as a cladogram, is a diagram that shows how different living things are related. Phylogenetic trees may show the relationships between species or between larger groups.

To create a phylogenetic tree, scientists often compare and analyze many characteristics of the species or other groups involved. Although this may include internal and external physical traits, it can also …

If we plot similarities and differences on a tree, we have a hypothesis of how these characters changed across evolutionary time. Understanding this change—whether in anatomical, behavioral, or …

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