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Experiments show that both genes and environment affect behavior

Experiments reveal that both genetic and environmental factors shape animal behavior. Innate behaviors, such as those seen in digger wasps, can occur without prior experience, demonstrating instinctual actions. For instance, wasps raised in isolation construct nests identically to those in natural habitats. Fixed Action Patterns (FAP) are predetermined sequences triggered by specific stimuli, performed flawlessly from start to finish. Additionally, animals exhibit rhythms, like circadian cycles, synchronizing activities with environmental changes, all regulated by their biological clocks.

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Experiments show that both genes and environment affect behavior

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  1. Experiments show that both genes and environment affect behavior 3.2

  2. Innate Behaviors • Innate behavior - a behavior that is performed correctly with no previous experience. • Researches have observed that digger wasps raised in isolation build nests in the same way as in the wild.

  3. This concept of innate behavior does not mean that such behaviors are only determined by genes. • Even the most programmed behavior is influenced by environment.

  4. Graylag Goose • Fixed acction pattern (FAP) - an innate behavior that occurs as an unchangeable sequence of actions. • An animal can only perform a FAP from beginning to end. • A FAP is usually triggered by a specific stimulus.

  5. Rhythms of Behavior • Animals exhibit a variety of regularly repeated behaviors. • These behaviors are synchronized to changes in the environment. • Circadian rhythm – daily routine that cycles about every 24 hours. • They are controlled by an organism’s biological clock.

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