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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
Hybrid vigour is a possibility after:
  • A
    Clonal selection
  • B
    Species differentiation
  • C
    Crossing two plants
  • D
    None of the above
✓

Answer

  1. Crossing two plants

Explanation:

Increase in the level of production traits, due to crossing, is called as hybrid vigour, which is also known as 'heterosis'.

Increased heterozygosity is the major cause for hybrid vigour.It cannot be predicted.It is a 'trial and error' method.

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