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Learn how geographic isolation can cause speciation when a geographic barrier separates two populations of a species. See examples of snails, finches, and squirrels that evolved differently due to geographic isolation.
4 Νοε 2020 · Geographic isolation is a term that refers to a population of animals, plants, or other organisms that are separated from exchanging genetic material with other organisms of the same species. Typically geographic isolation is the result of an accident or coincidence.
Geographical isolation represents a major speciation factor in most animals and plants and causes a physical barrier to gene flow between populations, leading to the emergence of new species [11,43]. Barriers to gene flow (reproductive barriers in sexual organisms) may be raised by neutral processes such as genetic drift.
22 Ιουν 2023 · Geographic isolation is a compelling phenomenon wherein a species or population is divided by physical barriers—mountains, water bodies, and the like—hindering mating and gene flow among them.
Synthesize examples of geographic isolation across different species and discuss their evolutionary outcomes. Examples of geographic isolation can be observed in various species, such as the finches on the Galápagos Islands and the formation of new species through isolation in mountain ranges.
Speciation, the formation of new and distinct species by splitting a single lineage into two or more genetically independent ones. Hypotheses regarding how speciation begins differ in the role of geographic isolation and the origin of reproductive isolation (preventing populations from breeding with one another).
