The probability that the offspring of two pea plants with wrinkly seeds will have round seeds is 0%. This is because wrinkled seed shape is a recessive trait in pea plants, while round seed shape is a dominant trait. When two pea plants with wrinkled seeds are crossed, all of their offspring will inherit at least one wrinkled seed gene, making it impossible for them to have round seeds. Therefore, the correct answer is (A) 0%.
