In a classic experiment from the 1930s, a biologist conducted selective breeding experiments involving maze-running behavior in rats. He repeatedly bred together males and females that made the fewest mistakes, and he also bred together males and females that made the most mistakes. After eight generations, all mice that descended from "maze-smart" parents were better at running the maze than all mice that descended from "maze-dumb" parents. This study indicates that:

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The study indicates that trial-and-error learning in rats appears to have a genetic component, as the maze-smart mice were the ones that descended from previous generations of parents who made fewer mistakes. It suggests that there is a genetic basis for the ability to learn and improve at maze-running behavior.

In a Classic Experiment from the 1930s, a Biologist Conducted