When two populations that are incompletely reproductively isolated from each other are able to come into contact with each other, if they are easily able to breed with each other and hybrid offspring survive well, then over time you would predict that…. Group of answer choices the two populations should now be called two different species hybrids will begin to have a lower fitness than non-hybrid offspring reinforcement of species boundaries will occur any phenotypic differences will be erased and the two populations will become one homogeneous population
Added by Kent F.
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Reproductive isolation is a mechanism that prevents different species from interbreeding. In this case, the two populations are incompletely reproductively isolated, meaning they can still interbreed to some extent. Show more…
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When hybrids produced in a hybrid zone can breed with each other and with both parent species, and they survive and reproduce as well as members of the parent species, one would predict that a. the hybrid zone would be stable. b. sympatric speciation would occur. c. reinforcement of reproductive barriers would keep the parent species separate. d. reproductive barriers would lessen and the two parent species would fuse.
Adi S.
Compare the fitness of hybrids in cases where reinforcement occurs versus cases where speciation by hybridization occurs. When reinforcement occurs, hybrids have the same fitness; this creates fusion between the two populations because they can freely interbreed. In contrast, the hybrids in the case of speciation by hybridization have lower fitness, usually because they do not have the proper adaptations for certain ecological conditions. When reinforcement occurs, a hybridization zone develops in a well-defined zone. Hybrids have higher fitness that stabilizes the hybrid zone. The hybrids in the case of speciation by hybridization also have higher fitness, usually because they happen to have adaptations for certain ecological conditions. They may form a new species. When reinforcement occurs, hybrids have higher fitness; this is why increasing hybridization improves the fitness of reproductive individuals. In contrast, the hybrids in the case of speciation by hybridization have lower fitness; therefore, the separation of the two species is accelerated. When reinforcement occurs, hybrids have low fitness; this is why avoiding hybridization improves the fitness of reproductive individuals (their reproductive efforts are not wasted). In contrast, the hybrids in the case of speciation by hybridization have higher fitness, usually because they happen to have adaptations for certain ecological conditions.
Kerissa B.
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