A researcher wants to study the inheritance of flower color in a species of plant. They cross a true-breeding plant with red flowers with a true-breeding plant with white flowers. All of the resulting offspring have pink flowers. The researcher then crosses two of the pink-flowered offspring together and obtains a ratio of 1 red: 2 pink: 1 white in the next generation. Which of the following statements is true about the inheritance of flower color in this species of plant?
