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Lect4 Bld3
Phylogenetics
12
Biology
Undergraduate 2
07/29/2009

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Cards

Term

 

 

phylogeny

Definition

 

 

 

 The evolutionary history of a species or group of related species.

Term

 

 

 

systematics

Definition



A scientific discipline focused on classifying organisms and determining their evolutionary relationships.

Term

 

 

 

taxonomy

Definition

 

 

A scientific discipline concerned with naming and classifying the diverse forms of life.

Term

 

 

 

binomial

Definition

 



The two-part latinized name of a species, consisting of the genus and specific epithet.

Term

 

 

phylogenetic tree

Definition


A branching diagram that represents a hypothesis about the evolutionary history of a group of organisms.

Phylogenetic trees do show patterns of descent
Phylogenetic trees do not indicate when species evolved or how much genetic change occurred in a lineage
It shouldn’t be assumed that a taxon evolved from the taxon next to it

Term

 

 

PhyloCode

Definition

 

 

 

which recognizes only groups that include a common ancestor and all its descendents

Term

 

 

 

cladistics

Definition

 

 

An approach to systematics in which organisms are placed into groups called clades based primarily on common descent.

Term

 

 

 

clade

Definition


 A group of species that includes an ancestral species and all its descendants.
Term

 

 

 

monophyletic

Definition


 Pertaining to a group of taxa that consists of a common ancestor and all its descendants. A monophyletic taxon is equivalent to a clade.
Term

 

 

 

paraphyletic

Definition


 Pertaining to a group of taxa that consists of a common ancestor and some, but not all, of its descendants.
Term

 

 

 

polyphyletic

Definition


Pertaining to a group of taxa derived from two or more different ancestors.
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