Explain Lamarckism and state its limitations.

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(A) Lamarckism,proposed by the French naturalist Jean-Baptiste Lamarck,suggests that evolution of life forms occurred due to the use and disuse of org

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Inheritance of acquired characters

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(A) Lamarckism,proposed by the French naturalist Jean-Baptiste Lamarck,suggests that evolution of life forms occurred due to the use and disuse of organs.He used the example of giraffes,stating that they evolved long necks to reach leaves on tall trees.He proposed that this acquired character (long neck) was passed on to subsequent generations.However,this theory is now largely discredited because acquired characters (somatic changes) are not inherited by offspring.Modern genetics proves that only changes in the germ cells (genotype) are heritable,not the changes acquired during an individual's lifetime.

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