Regular hybridization, resulting in hybrid organisms with low fitness, could lead to natural selection favoring what outcome?

• A. Reinforcement.
• B. Fusion of the two species.
• C. A stable hybrid zone.
• D. Extinction of one species.

Answer: (A)

Verified step by step guidance

1. Understand the concept of hybridization: Hybridization occurs when individuals from two different species interbreed, producing hybrid offspring.
2. Consider the fitness of hybrid organisms: In this scenario, the hybrid organisms have low fitness, meaning they are less likely to survive and reproduce compared to purebred individuals.
3. Explore the concept of reinforcement: Reinforcement is a process where natural selection increases reproductive isolation between two species to prevent the production of low-fitness hybrids.
4. Analyze the role of natural selection: Natural selection would favor traits that reduce hybridization, such as changes in mating behavior or timing, to avoid the production of low-fitness hybrids.
5. Conclude with the outcome: Given the low fitness of hybrids, natural selection would likely favor reinforcement, leading to increased reproductive isolation and reduced hybridization between the two species.