Which one of the following cannot be explained on the basis of Mendel's Law of Dominance?

Options

A. The discrete unit controlling a particular character is called a factor
B. Out of one pair of factors one is dominant, and the other recessive
C. Alleles do not show any blending and both the characters recover as such in `F_(2)`-generation
D. Factors occur in pairs

Answer

C

Explanation

Out of the following statement (c ) is incorrect because the law of dominance does not occur universally. After Mendel several cases were recorded by scientists, where a clear deviation from law of dominance was seen.
Where, `F_(1)` hybrids exhibited a mixture or blending of character of two parents, the case is considered as that of incomplete dominance or blending inheritance. It simply means that two genes of allelomorphic pair are not related as dominant or recessive, but are not related as dominant or allelomorphic pair are not related as dominant or recessive, but each of them expresses itself partially. In the case of 4 O'clock plant, when plants with red flowers are crossed with plants having white flower, the `F_(1)` hybrids bear pink flower. When these pink flowers are self pollinated, they develop red, pink and white flowers in the ratio of 1 : 2 : 1 respectively.