We Will...

Examine Cladograms and Phylogenetic Trees and how they link organisms to common ancestors

1. Modern taxonomists consider the phylogeny of an organism when attempting to classify it

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Phylogenetic Trees

2. Phylogeny is: the evolutionary relationship between organisms

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Phylogenetic Trees

3. To show the evolutionary relationship between different groups of organisms, scientists construct phylogenetic trees

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Phylogenetic Trees

4. A phylogenetic tree is a family tree that shows: evolutionary relationship thought to exist among different organisms

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Phylogenetic Trees

the phylogenetic tree to the right shows a few of the phyla of the Animal Kingdom

Phylogenetic Trees

We Will...

Examine Cladograms and Phylogenetic Trees and how they link organisms to common ancestors

A. Cladistics is a relatively new method of: establishing evolutionary relationships

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Cladograms

B. Cladistics uses features called "Shared Derived Characteristics" to establish evolutionary relationships

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Cladograms

C. A "derived character" is a feature that: evolved only within the group under consideration

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Cladograms

D. An example might be the feathers of birds. Birds are the only animals to have feathers. It is therefore assumed that feathers evolved within the bird group and were not inherited from a distant ancestor

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Cladograms

E. Shared derived characters are strong evidence of evolutionary relationships between the organisms that share them.

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Cladograms

​G. Cladogram - What are the "derived characters" shown in this cladogram

We Will...

Examine Cladograms and Phylogenetic Trees and how they link organisms to common ancestors