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

Options

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

Answer

B

Explanation

(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 of the parental characters in a monohybrid cross in the `F_(1)` and the expression of both in the `F_(2)`. It also explains the proportion of 3:1 obtained at the `F_(2)`.