To determine the genotype of a tall plant at \({F}_{2}\), Mendel crossed the tall plant from with a dwarf plant. This is…

To determine the genotype of a tall plant of \({F}_{2}\) generation, Mendel crossed the tall plant from \({F}_{2}\) generation with a dwarf plant. He called this a test cross. In a typical test cross an organism (pea plants) showing a dominant phenotype whose genotype is to be detrained is crossed with the recessive parent instead of self–crossing. The progenies of such a cross can easily be analyzed to predict the genotype of the test organism.