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BIO NMDCAT Lamarckism
nmdcat.online July 14, 2026

Which of the following experiments directly and systematically refuted Lamarck’s theory of the inheritance of acquired characters?

A. Mendel's hybridization experiments on garden peas
B. Weismann's amputation of mice tails for over twenty generations
✓
C. Pasteur's swan-neck flask experiment on abiogenesis
D. Griffith's transformation experiment on Streptococcus pneumoniae

📝 Explanation

August Weismann cut off the tails of mice for 22 consecutive generations. The offspring of the 23rd generation still developed normal tails, proving that somatic modifications (mutilations/acquired traits) are not inherited.

📖 Additional Information

  • Mendel's hybridization experiments on garden peas
  • Weismann's amputation of mice tails for over twenty generations
  • Pasteur's swan-neck flask experiment on abiogenesis
  • Griffith's transformation experiment on Streptococcus pneumoniae

August Weismann cut off the tails of mice for 22 consecutive generations. The offspring of the 23rd generation still developed normal tails, proving that somatic modifications (mutilations/acquired traits) are not inherited.

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