Phylogeny and Cladistics Flashcards
What is phylogenetics?
The study of evolutionary relationships between organisms
The study of phylogenies
hypotheses about how the species got to where they are
What are phylogenies?
Evolutionary histories of species or lineages(how species got to where they are now)
what are the lines of evidence used to make hypotheses for phylogenetics?
Homologous morphology (shape form (bone arrangement between species)
The fossil record
Behaviour and habitat
Molecular sequences (protein or DNA sequences)
Phylogenetic trees
A branching diagram that represents a hypothesis about the evolutionary history of a group of organisms
can be drawn to show relationships
between closely related species
can be drawn to show “all” known species
allow us to classify organisms into different hierarchical groups
Domain
taxonomic category above level of kingdoms
Kingdom
taxonomic category above level of phylum
Phylum
taxonomic category above level of classes
Class
taxonomic category above level of order
Order
taxonomic category above level of family
Family
taxonomic category above level of genus
Genus
taxonomic category above the species level- to which the species belongs to (plural is genra)
Species
a population or group of populations whose members have the potential to interbred in nature and produce viable fertile offspring but not produce viable fertile offspring with members of other such groups
Taxon/taxa
a named taxonomic unit at any given level of classification
Basal taxon
in a specified group of organisms, a taxon whose evolutionary lineage diverged early in the history of the group
Sister taxa
group of organisms that share an immediate common ancestor and are each others closest relative