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Questions and Answers
What type of isolation occurs when two species have different mating rituals?
What type of isolation occurs when two species have different mating rituals?
Which mechanism prevents fertilization due to structural differences in reproductive organs?
Which mechanism prevents fertilization due to structural differences in reproductive organs?
What results from the mating between a horse and a donkey?
What results from the mating between a horse and a donkey?
Which type of isolation prevents species from meeting due to their different habitats?
Which type of isolation prevents species from meeting due to their different habitats?
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What is the primary cause of gametic isolation?
What is the primary cause of gametic isolation?
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Study Notes
Prezygotic Isolation Mechanisms
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Ecological Isolation: Different habitats prevent interaction between species. Lions and tigers are an example, occupying distinctly different regions.
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Temporal Isolation: Different breeding times in otherwise compatible species prevent mating. Day-blooming and night-blooming cacti illustrate this.
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Behavioral Isolation: Unique courtship rituals signal species-specificity. Male jumping spiders' intricate dances are crucial for attracting the correct females.
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Mechanical Isolation: Incompatible reproductive structures prevent mating. The intricate genital shape of some arthropods is an example.
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Gametic Isolation: Incompatible gametes prevent fertilization. In coral reefs, different molecular markers on eggs and sperm only allow fertilization among the same species.
Postzygotic Isolation Mechanisms
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Hybrids: Offspring of interspecies mating.
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Zygotic Mortality: Fertilized zygotes fail to develop to maturity.
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Hybrid Inviability: Hybrid offspring have low survival rates.
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Hybrid Infertility: Hybrids, though surviving, are sterile (cannot reproduce). Mules are an example of a sterile hybrid (horse and donkey).
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Description
Explore various isolation mechanisms in biology that prevent interbreeding between species. This quiz covers prezygotic and postzygotic mechanisms, including ecological, temporal, and behavioral isolation. Test your understanding of these concepts through detailed questions.
