Weismann’s experiment discredited the hypothesis of:

The correct answer is:

Jean Baptiste de Lamarck

• In The Germ Plasm, Weismann rejects the theory and argues that acquired characteristics are traits of the soma cells, and the hereditary substances of soma cells cannot transmit to the next generation.
• Weismann conducted a famous experiment to try to disprove the inheritance of acquired characteristics. He cut the tails off of several generations of mice and measured the tails in their offspring.