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Which law explains the expression of the dominant phenotype in the F2 progeny?

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in Biology – Class 12 by (271k points)
Which law explains the expression of the dominant phenotype in the F2 progeny?

(a) Law of Recessivity

(b) Law of Dominance

(c) Law of Segregation

(d) Law of Independent Assortment

I got this question during an interview.

This interesting question is from Inheritance Principles in division Principles of Inheritance and Variation of Biology – Class 12

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The correct option is (b) Law of Dominance

The explanation: According to the law of dominance, the factors occur in pairs. One factor is dominant over the other. This leads to suppression of the expression of the recessive allele. Thus, the recessive allele can express only when both copies of the gene are recessive. This can give the F2 progeny the observed phenotype of 75% dominant and 25% recessive.

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