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Principles of Inheritance and Variation — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYPrinciples of Inheritance and Variation1 Mark
MCQ
The idea of mutations are brought forth by:
  • A
    Gregor Mendel, who worked on Pisum sativum
  • B
    Hardy Weinberg, who worked on allele frequencies in a population
  • C
    Charles Darwin, who observed a wide variety or organisms during sea voyage
  • D
    Hugo do Vries, who worked on evening primrose
✓

Answer

  1. Hugo do Vries, who worked on evening primrose

Explanation:

Hugo de Vries based on his work on evening primrose brought forth the idea of mutations- large arising suddenly in a population. He believed that it is mutation which causes evolution and not the minor variations (heritable) that Darwin talked about. Mutations are random and directionless while Darwinian variations are small and directional.

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