Evolution: How did Lamarck explain evolution?

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Genetic Mutations

Changes in a single gene

Lamarck's Theories Disproved?

Lamarck didn't know how the traits were inherited or that an organism's behavior didn't effect it's characteristics

Somatic Mutations

Mutations not passed on to next generation

Use + Disuse Theory

Through selective use and disuse of an organism's organs, traits were either acquired or lost over time. These additional (or lack of) traits could then be passed on to offspring. Which eventually led to the evolution of a species.

Inheritance of Acquired Characteristics

Traits developed during a parent's lifetime could be passed to their offspring


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