Two Species Interbreed Occasionally and Produce Vigorous, Fertile Hybrids

question 23

Multiple Choice

Two species interbreed occasionally and produce vigorous, fertile hybrids. When the hybrids breed with each other or with either parent species, however, the offspring are feeble or sterile. These species are affected by

• A) gametic isolation.
• B) reduced hybrid fertility.
• C) reduced hybrid viability.
• D) hybrid breakdown.

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