You open your first greenhouse, and you are eager to create new hybrid plants to sell. You cross a true-breeding tall, purple-flowered rose with a true-breeding short, white-flowered rose. All of your offspring are short, pink-flowered roses. What does this tell you about the phenotypic expression of these characteristics?

MCQs on various topics in genetics, focusing on DNA, genes, and chromosomes. Topics include: crosses, mitosis and meiosis, protein synthesis, linkage, chromosome mapping, anomalies and disorders, and genetics technology and tools.