The inability of individuals within a species to create offspring with members of any other species. The mark of a species is its reproductive isolation from all other species.
Separateness of a species from another, represented by an inability to reproduce with one another to produce viable offspring.
Two populations of organisms are isolated if their members are unable to interbreed and produce fertile offspring. Various structural, behavioral, and biochemical features can prevent interbreeding and thus reproductively isolate populations as distinct species. Reptilia reprimere, to press back, keep back] The vertebrate class of reptiles, represented by lizards, snakes, turtles, and crocodilians.
The isolation from each other, in space or time, of two parts of a population of which the individuals would be capable of interbreeding were this not prevented by their isolation. Such isolation is believed to be normal precondition for the evolution of new species to occur, especially in animals.
Long-term geographic separation of members of a particular sexually reproducing species.
lack of interbreeding between the individulas of the same species due to different time or pattern of reproduction (examples: Lough Melvin trout, Balsfjord herring)
When two populations are incapable of interbreeding due to physical, temporal, or biological barriers
The condition in which a population is not exchanging genes with other populations of the same species.
A form of genetic isolation where gene transfer between different populations of a species is prevented. The isolating mechanisms may be ecological (such as water barriers), seasonal ( eg breeding seasons at different times of the year), behavioural ( eg different courtship behaviours in each group) or physiological (some aspect of body form or function prevents mating between individuals from each group). In time, reproductive isolation may lead to the evolution of new sub-species or new species.
The situation where two populations are prevented or restricted from interbreeding by isolating mechanisms.
An important concept in evolutionary biology, reproductive isolation is a category of mechanisms that prevent two or more populations from exchanging genes. The separation of the gene pools of populations, under some conditions, can lead to the genesis of distinct species. Reproductive isolation can occur either by preventing fertilization, or by the creation of a degenerate or sterile hybrid, such as the case with the common mule and the hinny.