Mendel proposed the Law of Dominance based on

Mendel proposed the Law of Dominance based on the monohybrid cross. For example, in his experiments on flower color in pea plants, he crossed a purebred purple-flowered pea plant with a purebred white-flowered pea plant. In the F₁ generation of the cross, all the individuals had purple flowers, indicating that the allele for purple flowers was dominant over the allele for white flowers.