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What kind of selection is exerted on a p...

What kind of selection is exerted on a population if both the smaallest-and largest-sized individuals contribute relatively fewer offspring to the next generation than individuals that are closer to the average size of individuals in the questions?

A

Stabilizing selection

B

directional selection

C

disruptive selection

D

sexual selection

Text Solution

AI Generated Solution

The correct Answer is:
To determine the type of selection exerted on a population where both the smallest and largest individuals contribute relatively fewer offspring compared to those closer to the average size, we can follow these steps: ### Step-by-Step Solution: 1. **Understand the Question**: The question describes a scenario where individuals of extreme sizes (both smallest and largest) produce fewer offspring than those of average size. This indicates a preference for average-sized individuals in terms of reproductive success. 2. **Identify Types of Natural Selection**: - **Directional Selection**: Favors one extreme phenotype over others, leading to a shift in the population's traits in one direction. - **Stabilizing Selection**: Favors the average or intermediate phenotypes, reducing variation by selecting against extreme traits. - **Disruptive Selection**: Favors two or more extreme phenotypes over the average, potentially leading to speciation. - **Sexual Selection**: Involves traits that improve mating success rather than survival. 3. **Analyze the Given Scenario**: Since the smallest and largest individuals are producing fewer offspring, it suggests that these extreme phenotypes are being selected against. In contrast, the average-sized individuals are favored, as they contribute more offspring to the next generation. 4. **Conclusion**: The type of selection that is occurring in this population is **Stabilizing Selection**. This is because it favors the average individuals while selecting against the extremes (smallest and largest). 5. **Final Answer**: The answer to the question is **Stabilizing Selection**.
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