Please choose the correct answer to the question: In pea plants, the allele for smooth peas is dominant (S). If a heterozygous smooth pea plant (Ss) is crossed with a homozygous smooth pea plant (SS), which are the possible genotypes the offspring could have?

Answer1: only SS Answer2: only Ss Answer3: Ss or SS Answer4: ss or SS

Answer format: answer1/answer2/answer3/answer4