homoplasy


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homoplasy

[′hä·mə‚plā·sē]
(biology)
Correspondence between organs or structures in different organisms acquired as a result of evolutionary convergence or of parallel evolution.
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Our genome sequence data and the overall tree structure obtained from analysis of indel data lent support to a paucity of homoplasy effects.
All these characters, however, show homoplasy (Figs.
Misleading instances of homoplasy, especially in wood, leaf, and pollen characters of the Lythraceae, need to be considered when assigning relationships.
Data from amplified fragment length polymorphism (AFLP) markers show indication of size homoplasy and of a relationship between degree of homoplasy and fragment size.
tree length, CI and RI) indicated more synapomorphic value and less homoplasy when urogenital duct characters were optimized to a phylogeny with a monophyletic Salamandroidea.
2000, "Phylogeny and flower evolution of the Swertiinae (Gentianaceae- Gentianeae) : homoplasy and the principle of variable proportions", Syst.
Because the chloroplast genomes of plants that no longer carry on photosynthesis are subject to reduced selection pressures, their mutation rates are often elevated which can lead to homoplasy and misleading phylogenies (Felsenstein, 1978; Nickrent and Star, 1994; dePamphilis, 1995; Nickrent and Duff, 1996, 1996; Nickrent et al.
Wood and Harrison argued that it is naive to assume that all fossils are the ancestors of creatures alive today and also noted that shared morphology or homoplasy - the same characteristics seen in species of different ancestry - was not taken into account by the scientists who found and described the fossils.
For Rosseto (2001), similar PCR products should be carefully compared, since several factors can lead to homoplasy.
20 PIC, number of parsimony informative characters; TL, most parsimonious tree length; EPT, number of equally parsimonious trees; CI, consistency index; HI, homoplasy index; RI, retention index; RCI, rescaled consistency index.
As a sequencing-based method for a single locus, spa typing possesses moderate discriminatory power, between PFGE and MLST; however, repeat-based spa typing is subject to misclassification bias due both to horizontal DNA transfer and to recombination and homoplasy (16).