Question

A theory explaining the mechanism of evolution based on change of gene structure was put forward by :

• A. De Vries
• B. Darwin
• C. Lamarck
• D. Wallace

Answer 1

Answer: (A)

De Vries

• The theory which took change of gene structure called mutation under consideration was put forward by Hugo De Vries.
  
• He his work on evening primrose suggested that variations occurred due to mutations.
  
• Mutations are random and directionless while the variations that Darwin talked about were small and directional. Hugo de Vries gave the name saltation (single step large mutation) to the mutations which brought about speciation.
  

So, the correct answer is 'De Vries'