Concord Consortium
DNA: The Double Helix
Picture a double helix as a twisted ladder. Scholars see this image through a simulation that allows young scientists to observe a small fragment of DNA in many different formats. They compare the models, colors, bonds, and strands as...
Cold Spring Harbor Laboratory
The DNA Molecule Is Shaped like a Twisted Ladder
One of the first models of DNA appeared to be a triple helix. Young scientists learn about the many scientists who worked to find the shape of DNA. They observe multiple models, tests, and experiments to understand the conclusions. An...
Cold Spring Harbor Laboratory
Dolan Dna Learning Center: Dna Molecule: Triple Helix
A description of how the triple-helix DNA model was a precursor to the accepted double-helix model of our DNA. [0:27]