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  2. List of genetic hybrids - Wikipedia

    en.wikipedia.org/wiki/List_of_genetic_hybrids

    This is a list of genetic hybrids which is limited to well documented cases of animals of differing species able to create hybrid offspring which may or may not be infertile. Hybrids should not be confused with genetic chimeras , such as that between sheep and goat known as the geep .

  3. Hybrid incompatibility - Wikipedia

    en.wikipedia.org/wiki/Hybrid_incompatibility

    Hybrid incompatibility occurs when the offspring of two closely related species are not viable or suffer from infertility. Charles Darwin posited that hybrid incompatibility is not a product of natural selection, stating that the phenomenon is an outcome of the hybridizing species diverging, rather than something that is directly acted upon by selective pressures. [4]

  4. Hybrid speciation - Wikipedia

    en.wikipedia.org/wiki/Hybrid_speciation

    Hybrid speciation is a form of speciation where hybridization between two different species leads to a new species, reproductively isolated from the parent species. Previously, reproductive isolation between two species and their parents was thought to be particularly difficult to achieve, and thus hybrid species were thought to be very rare.

  5. Reproductive isolation - Wikipedia

    en.wikipedia.org/wiki/Reproductive_isolation

    Such that, only a few fertile females have been found amongst the other species among the thousands that have been analyzed. However, when hybrids are produced between both species, the gene flow between the two will continue to be impeded as the hybrid males are sterile. Also, and in contrast with the great vigor shown by the sterile males ...

  6. Hybrid (biology) - Wikipedia

    en.wikipedia.org/wiki/Hybrid_(biology)

    A mule is a sterile hybrid of a male donkey and a female horse.Mules are smaller than horses but stronger than donkeys, making them useful as pack animals.. In biology, a hybrid is the offspring resulting from combining the qualities of two organisms of different varieties, subspecies, species or genera through sexual reproduction.

  7. Hybrid zone - Wikipedia

    en.wikipedia.org/wiki/Hybrid_zone

    Hybrid zones can form from secondary contact. A hybrid zone exists where the ranges of two interbreeding species or diverged intraspecific lineages meet and cross-fertilize. . Hybrid zones can form in situ due to the evolution of a new lineage [1] [page needed] but generally they result from secondary contact of the parental forms after a period of geographic isolation, which allowed their ...

  8. Alien-human hybrids are unlikely but not impossible ... - AOL

    www.aol.com/alien-human-hybrids-unlikely-not...

    Human-alien hybrids fill science fiction stories, and the most famous of these is Mr. Spock from Star Trek — the logical science officer of the starship Enterprise. Does this mean that it will ...

  9. Interspecific pregnancy - Wikipedia

    en.wikipedia.org/wiki/Interspecific_pregnancy

    Interspecies compatibility is related to the type of placentation, as mothers of species having the more invasive hemochorial placentation (such as humans) must create a stronger downregulation of maternal immune responses, and are thereby more receptive to fetuses of other species, compared to those with endotheliochorial (e.g. cats and dogs ...