
See also a 3D representation of a Holliday Junction
A more realistic animation of a migrating Holliday junction along with representations of some of the proteins that control it can be found at: http://www.sdsc.edu/journals/mbb/ruva.html
Click one of the diagrams below for another view of Holliday junctions:


Heteroduplex formation without recombination
Recombination and heteroduplex formation
You can also visit the home page of the Protein Synthesis Cartoon to see another example of animation for teaching genetics.