Question

Why are the traits experiences acquired during the entire lifetime of an individual not inherited in the next generation? Explain the reason of this fact with an example

Answer 1

it is because the traits experienced by an individual during his lifetime don't affect the germ cells of the individual and hence there is no change in the DNA and the trait does not get passed on to the next generation , these types of traits are also called as acquired traits.

example : the muscles of a body builder does not affect his germ cells and it is not passed onto his progeny

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Answer 2

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Experiences of an individual during its life time are in the somatic cells of the body. That is, in non-reproductive tissues that cannot be passed to the next generation. Thus, they cannot contribute directly in evolution.

For inheritance of traits over generations and involvement in direct evolution, they must be passed to the DNA of the germ cells (reproductive tissues). The characteristics of DNA are passed to the progeny and also can play direct role in evolution.