Explain Mendel’s law of dominance.

● Law of Dominance was based on the results of monohybrid cross (crossing plants with one contrasting characters).

● When two homozygous plants, with one contrasting character, is crossed, the character which is expressed in an F₁ generation is known as a dominant character while the character which is not expressed in an F₁ generation is known as recessive character.

● Example: If pure or homozygous tall plants (TT) are crossed with pure homozygous dwarf plant (tt), then we obtains all the plants in F₁ generation (100%) as tall plants.

The appearance of all tall pants proves the law of dominance.