Mendel mated twocontrasting, true-breedingvarieties, a process calledhybridization 雜交 The true-breeding parents arethe P generation 親代 The hybrid offspring of the Pgeneration are called theF1generation 第一子代 When F1individuals self-pollinate or cross-pollinatewith other F1 hybrids, theF2generation 第二子代 isproduced