Parapatric speciation — is a form of speciation that occurs due to variations in mating frequency of a population within a continuous geographical area. In this model, the parent species lives in a continuous habitat, in contrast with allopatric speciation where… … Wikipedia
parapatric speciation — the differentiation into distinct species of populations experiencing some gene flow … Dictionary of ichthyology
parapatric speciation — Populations in geographical ranges that come in contact and genetic interchange is possible even without sympatry; see dichopatry … Dictionary of invertebrate zoology
Speciation — Part of a series on Evolutionary Biology … Wikipedia
Allopatric speciation — Allopatric speciation, also known as geographic speciation, is the phenomenon whereby biological populations are physically isolated by an extrinsic barrier and evolve intrinsic (genetic) reproductive isolation, such that if the barrier breaks… … Wikipedia
semigeographic speciation — see parapatric speciation … Dictionary of invertebrate zoology
Evolution — This article is about evolution in biology. For other uses, see Evolution (disambiguation). For a generally accessible and less technical introduction to the topic, see Introduction to evolution. Part of a series on … Wikipedia
Hybrid zone — A hybrid zone exists where the ranges of two interbreeding species meet. For a hybrid zone to be stable, the offspring produced by the cross (the hybrids) have to be less fit than members of the parent species, although this condition does not… … Wikipedia
Эволюция — Эта статья о биологической эволюции. Другие значения термина в заглавии статьи см. на Эволюция (значения). Фи … Википедия
Cycad — Cycadophyta Temporal range: Early Permian–Recent … Wikipedia
Genetic isolate — A genetic isolate is population of organisms that has little genetic mixing with other organisms within the same species. This may result in speciation, but this is not necessarily the case. Genetic isolates may form new species in several ways:* … Wikipedia
