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BotanyNEET 2024Mendel's laws and deviations

Principles of Inheritance and Variation

Which of the following can be explained on the basis of Mendel's Law of Dominance?

A. Out of one pair of factors one is dominant and the other is recessive.

B. Alleles do not show any expression and both the characters appear as such in the generation.

C. Factors occur in pairs in normal diploid plants.

D. The discrete unit controlling a particular character is called a factor.

E. The expression of only one of the parental characters is found in a monohybrid cross.

Choose the correct answer from the options given below:

  1. A.A, C, D and E only✓
  2. B.B, C and D only
  3. C.A, B, C, D and E
  4. D.A, B and C only

Solution

The law of dominance covers: characters are controlled by factors (D); factors occur in pairs (C); in a dissimilar pair one factor is dominant, the other recessive (A); so only one parental character shows in the of a monohybrid cross (E). Statement B describes incomplete/co-dominance, not dominance. So A, C, D and E.

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