While working with pea plants, Gregor Mendel noticed that offspring were similar to their parent plants, which led him to some of the earliest theories about genetics.
The garden pea has several advantageous characteristics that allowed Mendel to develop the laws of modern genetics.
Mendel's crosses involved mating two true-breeding organisms that had different traits to produce new generations of pea plants.
Mendel's experiments with peas revealed the presence of dominant and recessive traits in the filial generations.
The rules of probability can be applied to Mendelian crosses to determine the expected phenotypes and genotypes of offspring.