What it is

Relive the logic of Crick and collaborators in discovering that the 'words' of the genetic code consist of 3 letters. Their insightful choice of a powerful, appropriate experimental system means it's all about the ideas.

Clicking the graduation cap above goes to the teaser trailer

the underlying paper is briefly reviewed (and enthusiastically recommended as a student investigation) here.


Click the key above; once you select an exercise and go to the 'Main Lab' destination, check out the 'Show me...' and 'Protocols...' menu


Mac version
Win version
Several modules are available via a desktop launcher. ***For Macs, read here.

Browser Launch

***I believe all browsers now block the required plug-in, and Adobe is no longer supporting it :-( *** Run the browser version (requires Shockwave; the browser will also ask to install some safe 'plug-ins'). Log-in/stored work option available.

Rubric & Sample Assignment

The assignment goes well delivered in two phases--'successful grant' awarded after when a student demonstrates a plausible and complete 'plan of attack'. Example answers

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