Directional Selection
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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.
Practice Version
Directional Selection: A form of natural selection which favors an uncommon trait, leading to a genetic shift of the population. Directional selection. It is when a specific trait becomes more common in a population because it gives an advantage for survival and reproduction.