In this episode, we look into the Inheritance Theory.

Lamarck's theory of acquired inheritance proposed that traits developed during an animal's life could be passed to its offspring.

The classic example used to illustrate this idea involved giraffes whose necks supposedly grew longer through repeated stretching to reach high foliage. 

Lamarck argued that this acquired longer neck would then be inherited by subsequent generations.

However, the provided text explicitly states that this theory has been disproven. Modern understanding of genetics shows that changes occurring within an organism's lifetime are not heritable.

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