Mating attempts occur, but morphological differences prevent successful completion. This is an example of which reproductive isolation mechanism?

Mating attempts occur, but morphological differences prevent successful completion. This is an example of which reproductive isolation mechanism?

• A. Prezygotic Barrier
• B. Ecological Isolation
• C. Mechanical Isolation
• D. Postzygotic Barrier

Answer: (C)

This question targets prezygotic reproductive isolation, specifically mechanical isolation. Even though the organisms try to mate, their reproductive morphologies are incompatible, so the transfer of sperm or the completion of copulation can’t occur. The result is that fertilization cannot happen, preventing gene flow before any zygote forms. This is distinct from ecological isolation (different habitats) or postzygotic barriers (fertilization occurs but hybrids are sterile or inviable). The term mechanical isolation captures the idea of a physical, structural mismatch that blocks mating despite attempts.

This question targets prezygotic reproductive isolation, specifically mechanical isolation. Even though the organisms try to mate, their reproductive morphologies are incompatible, so the transfer of sperm or the completion of copulation can’t occur. The result is that fertilization cannot happen, preventing gene flow before any zygote forms. This is distinct from ecological isolation (different habitats) or postzygotic barriers (fertilization occurs but hybrids are sterile or inviable). The term mechanical isolation captures the idea of a physical, structural mismatch that blocks mating despite attempts.