Description By assembling the DNA model, children can learn that the total number of purine bases is equal to the total number of pyrimidine bases, each accounting for 50% of the total number of bases. The model not only provides an absolutely fun opportunity for your child, but also provides more basic educational skills. Features -Color: As Shown -Material: Paper -Size:33.00X11.60X11.60cm/ 12.97X4.56X4.56inch -Note: The color of the fixed rod is random -Can vividly show the details of the double helix model of DNA, allowing varying angles to demonstrate the model. -The bases included in nucleotides can be divided into four types: adenine (A), thymine (T), cytosine (C), and guanine (G). -Self-assembly design, free to learn the roles of DNA, such as replication, coding information, mutation or recombination. -Perfect for teaching physiology and hygiene in middle school, nursing school, medical school, physical therapy. -Let you explain the knowledge in books more concretely, making it easier for children and students to learn. Package list: 1 x Set of DNA model accessories