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Which one 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 $F_2$ generation.
$C$. Factors occur in pairs in normal diploid plants.
$D$. The discrete unit controlling a particular character is called 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:
$A, C, D$ and $E$ only
$B, C$ and $D$ only
$A, B, C, D$ and $E$
$A, B$ and $C$ only
Solution
According to Law of Dominance
($1$) Factors occur in pairs
($2$) In a dissimilar pair of factors one member of the pair dominates (dominant) the other recessive
($4$) Characters are controlled by discrete units called factors
The law of dominance is used to explain the expression of only one of the parental characters in a monohybrid cross.
Law of segregation is based on the fact that the alleles do not show any expression and both the characters are recovered as such in $\mathrm{F}_2$ generation
