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Mutation Theory
Concepts tested here
- De Vries and Oenothera
All Questions
2005 AIPMT 1 question
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De Vries gave his mutation theory on organic evolution while working on -Hugo de Vries proposed the mutation theory of evolution in 1901.
He worked on the evening primrose, Oenothera lamarckiana.
He observed that some plants suddenly showed new, large and discontinuous variations that bred true; he called these sudden changes mutations.
He suggested that evolution takes place by such large mutations (saltation) and not by the small continuous variations emphasised by Darwin.
Drosophila was used by Morgan for genetic studies, and Pisum sativum by Mendel.
So de Vries worked on Oenothera lamarckiana.