Explain the Law of Dominance using a monohybrid cross

Mendel’s Law of Dominance states that characters are controlled by discrete units that occur in pairs, called as factors. In a dissimilar pair of factors, one factor dominates over the other. Therefore, when two parents (P) of contrasting traits are crossed, the progeny (F1) will express only one of the traits and not the other. The trait expressed in the progeny will “dominate” over the trait and is called as the dominant trait whereas the alternate trait is called the recessive trait. The recessive trait reappears in the next generation (F2) when the F1 generation is selfed. This means that the recessive trait did not completely vanish but its expression was suppressed by the presence of the dominant allele. It can be explained as follows using a monohybrid cross. Monohybrid cross is a cross between two parents homozygous for contrasting traits of the only one character. e.g., cross between tall (TT) and short (tt) This shows that the dominant trait expresses itself in both homozygous and heterozygous condition whereas the recessive trait expresses itself only in the homozygous condition on the absence of the dominant trait.