Cladograms and Phylogenetic Trees

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What is a cladogram?

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A diagram that shows the evolutionary relationships among various biological species based on similarities and differences in their physical or genetic characteristics.

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What does each node on a cladogram represent?

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The last point at which two groups shared a common ancestor.

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What is a phylogenetic tree?

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A branching diagram that represents the evolutionary history of a group of organisms, showing how they are related through common ancestry.

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What is a common ancestor?

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An ancestor that two or more descendants share, indicating a point in evolutionary history where they diverged.

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What does monophyletic mean?

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A group of organisms that includes an ancestor and all its descendants.

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What is the significance of shared traits in cladistics?

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Shared traits help to determine evolutionary relationships and construct cladograms.

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What is the difference between a cladogram and a phylogenetic tree?

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A cladogram focuses on the branching order of species, while a phylogenetic tree includes information about the time of divergence and evolutionary distance.

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What does it mean if two species are closely related?

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They share a more recent common ancestor compared to other species.

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What is a clade?

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A group of organisms that includes an ancestor and all its descendants.

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How can you determine the closest relative of a species on a cladogram?

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By identifying the branch that is nearest to the species in question.