Q40. The mutation theory of saltation given by Hugo
deVries based on his work on:
(a) Drosophila
(b) Antirrhinum
(c) Evening primrose
(d) Garden Pea

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FirstInTest · Accepted Answer

Correct answer: c. Hugo de Vries was one of the scientists who rediscovered Mendel's laws of inheritance. He also proposed the Mutation Theory of evolution, which suggested that evolution occurs through sudden, large changes he called 'saltations' or 'single-step large mutations'. De Vries developed this theory based on his extensive breeding experiments and observations on the **Evening Primrose** (*Oenothera lamarckiana*). His work highlighted the importance of mutations as a source of variation for evolution, contrasting with Darwin's emphasis on gradual variations.

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