How do postzygotic isolating mechanisms prevent successful interspecies hybridization?Multiple choice question.The egg cannot be fertilized by sperm of another species following a successful mating attempt.Members of different species attempt to mate but are unsuccessful due to anatomical differences.Although fertilization is successful, the resulting hybrid is unable to develop or reproduce.Members of different species come into contact, but do not recognize one another as potential mates.
Question
How do postzygotic isolating mechanisms prevent successful interspecies hybridization?Multiple choice question.The egg cannot be fertilized by sperm of another species following a successful mating attempt.Members of different species attempt to mate but are unsuccessful due to anatomical differences.Although fertilization is successful, the resulting hybrid is unable to develop or reproduce.Members of different species come into contact, but do not recognize one another as potential mates.
Solution
The correct answer is: "Although fertilization is successful, the resulting hybrid is unable to develop or reproduce."
Postzygotic isolating mechanisms occur after fertilization. These mechanisms prevent successful interspecies hybridization by causing the hybrid offspring to be inviable (unable to develop properly) or sterile (unable to reproduce). This ensures that even if members of different species do mate and produce offspring, the hybrid offspring will not be able to contribute to the gene pool of either parent species, thus maintaining the genetic isolation of the two species.
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Hybrid inviability and hybrid infertility are two examples of Blank______.Multiple choice question.postzygotic isolating mechanismsprezygotic isolating mechanismsnon-adaptive isolating mechanismsnon-zygotic isolating mechanisms
What are reproductive isolating mechanisms?Multiple choice question.Barriers that prevent successful interbreeding among members of different speciesTechniques for isolating gametes and reproductive tissues for genetic analysis in order to identify speciesWays used by researchers to facilitate breeding of animals in captivityProcedures used in the study of courtship behavior in different speciesProcedures used to study the embryonic development of different species
When populations are only partially reproductively isolated, which of the following may occur?Multiple choice question.Postzygotic isolating mechanisms will act to prevent the survival and reproduction of hybrid offspring if a zygote is formed.Even though individuals are interbreeding, prezygotic and postzygotic isolating mechanisms ensure that hybrids do not survive and reproduce.Prezygotic isolating mechanisms will act to prevent the formation of a zygote if postzygotic isolating mechanisms fail.Despite prezygotic and postzygotic isolating mechanisms, some individuals may survive and reproduce.Need help? Review these concept resources.
Which of the following is an example of postzygotic isolation?Multiple choice question.Mating between a sheep and a goat produces an embryo that fails to develop.Several frog species that occupy the same habitat remain separate species because they breed at different times of year.Lions and tigers do not hybridize in the wild because they are ecologically isolated.A male moth cannot detect pheromones produced by females of different moth species.
When reproductive isolation prevents members of two populations from interbreeding and producing offspring, thus separating their gene pools, what process can occur?A.MutationB.Disruptive selectionC.Directional selectionD.Speciation
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