cladistics
- Noun:
- A method of biological classification: Cladistics is a system for classifying organisms based on shared characteristics derived from a common ancestor. It focuses on evolutionary relationships rather than just physical similarities.
- A phylogenetic analysis technique: Cladistics involves the use of comparative data to construct branching diagrams (cladograms) that represent the hypothesized evolutionary history of a group.
- Noun:
- Modern biologists often use cladistics to determine the evolutionary relationships between species.
- The study employed cladistics to analyze the genetic data and propose a new family tree for the reptiles.
"Maximum parsimony in cladistics": A principle used in cladistics that prefers the evolutionary tree requiring the fewest number of changes or character state transitions.
- The researcher applied the principle of maximum parsimony in her cladistics analysis.
"Cladistics versus phenetics": A comparison between classification based on evolutionary ancestry (cladistics) and classification based on overall similarity (phenetics).
- The debate between cladistics and phenetics shaped much of 20th-century taxonomic theory.
Cladistic (adj): Relating to or based on cladistics.
- The cladistic approach revealed unexpected relationships among the bird species.
Cladogram (n): A branching diagram showing the cladistic relationships between a number of species.
- The paper included a detailed cladogram of mammalian orders.
- Phylogenetic systematics: A synonym emphasizing the goal of revealing evolutionary lineage.
- Cladistic analysis: A more specific term for the methodological process.
Outgroup in cladistics: A species or group known to be closely related to, but not a member of, the group being studied, used for comparison.
- Selecting an appropriate outgroup is a critical step in cladistics.
Synapomorphy in cladistics: A shared, derived characteristic that distinguishes a clade (a group of organisms with a common ancestor) from other organisms.
- The presence of feathers is a synapomorphy for birds within cladistics.
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a system of biological taxonomy based on the quantitative analysis of comparative data and used to reconstruct cladograms summarizing the (assumed) phylogenetic relations and evolutionary history of groups of organisms
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