homoplasy

Englisch - Englisch

Definition von homoplasy im Englisch Englisch wörterbuch

A correspondence between the parts or organs of different species acquired as the result of parallel evolution or convergence

(Biyoloji) (An instance of) similarity of structure produced independently (as) by the operation of similar circumstances

A collection of phenomena that leads to similarities in character states for reasons other than inheritance from a common ancestor These include convergence, parallelism, and reversal

Possession by two or more species of a similar or identical character state that has not been derived by both species from their common ancestor This embraces convergent and parallel evolution (see Synapomorphy, Cladistics)

false homology See Convergence, Parallelism

Clad Any characteristic found in two taxa whose similarity is not due to common descent Called accidental coincidence in traditional stemmatics Opposed to homology In cladistics, both homology and homoplasy are determined a posteriori with reference to a particular phylogeny that maximizes homology and minimizes homoplasy

The existance of characters that have been subject to reversals, convergences or parallelisms

Similarity that has evolved independently and is not indicative of common phylogenetic origin

Homoplasy is the most general term for all kinds of non-homologies (see below) All shared character states, that have to be explained on a phylogenetic tree (cladogram) with more than one evolutionary step (multiple origins or losses) are referred to as homoplastic character states Homoplastic character states are caused by non-homologous similarities (homoplasies), thus either by a non-homology of the presence of a state (convergences), or by a non-homology of the absence (secondary absence) of a state (reductions or reversals)

Silbentrennung

ho·mop·la·sy