What does the term "bottleneck effect" refer to in evolutionary biology?

Prepare for your Arizona State University (ASU) BIO345 Evolution Exam 1. Study with comprehensive resources, including flashcards and multiple-choice questions with hints and explanations. Ace your exam!

Multiple Choice

What does the term "bottleneck effect" refer to in evolutionary biology?

The term "bottleneck effect" in evolutionary biology specifically refers to a sharp reduction in population size due to environmental events, such as natural disasters (e.g., earthquakes, floods) or human activities (e.g., habitat destruction, overhunting). When a population experiences such a dramatic decrease, it typically results in a loss of genetic diversity because only a limited number of individuals survive to repopulate. This reduced genetic variation can impact the population’s ability to adapt to environmental changes or pressures, leading to long-term effects on the population's evolutionary trajectory. The bottleneck effect highlights how random events can significantly influence the genetic composition of future generations, often resulting in a population that is less resilient to new challenges.

The term "bottleneck effect" in evolutionary biology specifically refers to a sharp reduction in population size due to environmental events, such as natural disasters (e.g., earthquakes, floods) or human activities (e.g., habitat destruction, overhunting). When a population experiences such a dramatic decrease, it typically results in a loss of genetic diversity because only a limited number of individuals survive to repopulate. This reduced genetic variation can impact the population’s ability to adapt to environmental changes or pressures, leading to long-term effects on the population's evolutionary trajectory. The bottleneck effect highlights how random events can significantly influence the genetic composition of future generations, often resulting in a population that is less resilient to new challenges.

More practice questions