Weismann cut off tails of mice generation after generation but tails neither disppeared nor shortened showing that

Options

A. Darwin was correct
B. tail is an essential organ
C. mutation theory is wrong
D. lamarckism was wrong in inheritance of acquired characters

Explanation

**Step-by-Step Solution:**

1. **Understanding the Experiment**: Weismann conducted an experiment where he cut off the tails of mice for several generations. This was done to test the theory of inheritance of acquired characteristics proposed by Lamarck.

2. **Lamarck's Theory**: According to Lamarckism, traits acquired during an organism's lifetime (like a mouse losing its tail) could be passed on to the next generation. This theory suggests that if a characteristic is used or needed, it becomes stronger or more pronounced, and if it is not used, it may diminish or disappear over generations.

3. **Weismann's Findings**: After cutting off the tails of mice for 22 generations, Weismann observed that the offspring continued to be born with tails. This indicated that the acquired trait (the absence of a tail) was not inherited by the next generation.

4. **Conclusion**: Weismann's findings demonstrated that the characteristics of somatic cells (like the tails of mice) do not influence the germ cells (which are responsible for reproduction). Therefore, the traits acquired during an organism's lifetime do not get passed on to its offspring.

5. **Implication**: This experiment supported the idea that only genetic information in the germplasm is inherited, leading to the conclusion that Lamarck's theory of inheritance of acquired characteristics is incorrect.

6. **Final Answer**: Weismann's experiment shows that acquired traits are not inherited, thus disproving Lamarckism.

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