Bio Ch25&26 Flashcards
Phylogeny
The evolutionary history of a species or group of species
Binomial
Two part format of the scientific name
Taxonomy
How organisms are named and classified
Linnaean classification
Domain, kingdom, phylum, class, order, family, genus, species
Analogy
Convergent evolution not shared ancestry
Homoplasies
Analogous structures that arose independently
Cladistics
Common ancestry used as primary criterion to classify organisms
Clades
Groups of species
Monophyletic
A single ancestral species and all of its descendants
Paraphyleric
An ancestral species and SOME of its descendants, not all
Polyphyletic
Distantly related species but does not include most recent common ancestor
Maximum parsimony
Investigate the simplest explanation that is consistent with facts
Maximum likelihood
Identifies the tree most likely to have produced a given set of DNA data
Orthologous genes
Homology resulting from a speciation event (occurs in different species)
Paralogous genes
Homology results from gene duplication (same species)
Molecular clock
Approach for measuring the absolute time of evolutionary change based on observation of genes at constant rates
Horizontal gene transfer
Genes transfer from one genome to another through mechanisms such as viral infection