DNA Double Helix Model – 22 Layers, miniDNA® Kit

DNA double helix model kit illustrating molecular structure, base pairing, and hydrogen bonding.

This extended molecular model kit represents a right-handed DNA double helix with 22 layers, providing greater structural depth for teaching advanced genetics concepts. Using clearly colour-coded components, it helps students visualise complementary base pairing, hydrogen bonds, and the spatial arrangement of DNA strands. Suitable for classroom demonstrations, group activities, and senior biology study, the model can be assembled and separated to explore DNA replication and molecular interactions in a hands-on way.

Key Features

• Buildable DNA double helix model with 22 base-pair layers
• Six easily distinguishable colours for clear identification of components
• Accurately represents hydrogen bonding between A–T and C–G base pairs
• Shows major and minor grooves on the DNA double helix surface
• Purine and pyrimidine bases differ in size for structural accuracy
• Can be used to demonstrate DNA replication and complementary base pairing
• Supplied with stand and clear assembly instructions

Specifications

• Model type: DNA double helix molecular model kit
• Helix orientation: Right-handed
• Layers: 22
• Kit contents: 11 thymine (orange), 11 adenine (blue), 11 guanine (green), 11 cytosine (yellow), 44 deoxyribose (red), 44 phosphate units (purple)
• Dimensions: Approx. 44 × 11 × 11 cm
• Weight: Approx. 500 g