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The idea of mutations was brought forth by

1. Gregor Mendel, who worked on Pisum sativum.
2. Hugo de Vries, who worked on evening primrose.
3. Hardy Weinberg, who worked on allele frequencies in a population.
4. Charles Darwin, who observed a wide variety of organisms during sea voyage.

Correct answer: Hugo de Vries, who worked on evening primrose.

Solution

Hugo de Vries is credited with proposing the mutation theory after studying variation in evening primrose. He used these observations to argue that new species can arise through sudden heritable changes.

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