Directional Selection

Real World Example

Imagine you're at a popular restaurant where everyone usually orders the classic cheeseburger, but suddenly, a new spicy burger is introduced, and everyone starts opting for it instead. This situation is similar to directional selection in nature, where an uncommon trait (like the spicy burger) becomes favored, leading the population (the diners) to shift their preference. Just as the restaurant's menu evolves as more people choose the spicy burger over the classic, in nature, a population's genetic makeup shifts toward the favored uncommon trait, altering the population over time.