Question

Weismann cut off the tails of mice generation after generation, but tails neither disappeared nor shortened, proving that _______.

• A. Darwin was correct
• B. tail is an essential organ.
• C. mutation theory was wrong
• D. Lamarckism was wrong

Answer 1

The correct option is D

Lamarckism was wrong

Lamarckism explained the inheritance of acquired characteristics and stated that an individual acquires characteristics during its lifetime and these are inherited by the successive generations. After several generations, the variations are accumulated to such an extent that they could give rise to new species.
This theory was proved wrong by August Weismann. He proved this by cutting off the tails of mice for as many as 22 generations and allowing them to breed. He observed that tailless mice were never born.