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NEETZoologyPrinciples of Inheritance and Variation

What does the Law of Dominance explain about the expression of parental characters in a monohybrid cross?

Options

  1. AThe expression of both parental characters in the F1 generation
  2. BThe expression of only one of the parental characters in the F1 generation
  3. CThe absence of parental characters in the F2 generation
  4. DThe mutation of parental characters in the F1 generation

Correct answer

B. The expression of only one of the parental characters in the F1 generation

Step-by-step solution

(i) Characters are controlled by discrete units called factors. (ii) Factors occur in pairs. (iii) In a dissimilar pair of factors one member of the pair dominates (dominant) the other (recessive). The law of dominance is used to explain the expression of only one of the parental characters in a monohybrid cross in the F1 and the expression of both in the F2 . It also explains the proportion of 3:1 obtained at the F2 .

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