Biotechnology · Research Worlds
DNA became something we can edit
Cas9 can be pointed at a chosen DNA sequence with an RNA guide, then cut. Reading the genome became rewriting it.
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Watch the 90-second visual story ↗What will you explore?
Jinek et al., 2012
Once you can point scissors at a DNA address, you can edit the recipe of life.
How does it work?
Watch a 90-second cinematic explanation, or explore a story that pauses so you can change its central mechanism. Inspect the source evidence, compare outcomes and resume the narration. This free Lesson Worlds adaptation needs no account or download; younger learners may want help from a parent or teacher.
Inside the cinematic story
What if scissors had an address?
An address. A guide. A cut.
Meet the search team.
Cas9 + guiding RNA + target DNA
Recognition has conditions.
A guide match alone is not the whole story.
Take control: Which target should the schematic show? Match + PAM · No compatible PAM
Both DNA strands break.
Targeted cleavage ≠ a completed edit
Change the guide.
Guide design changes target selection.
Keep the boundary in view.
Enter the mechanism. Inspect the evidence.
Discuss the evidence
Before starting, explain what you think this claim means: Once you can point scissors at a DNA address, you can edit the recipe of life. After exploring, choose one stage above and describe what its model helps you see. Separate what you observed in the adaptation from what the original researchers measured.
Read the original publication for its methods, evidence and limitations. Ask which part of the explanation the interactive model leaves out, and what additional evidence you would need to test the claim yourself.
Original schematic of the 2012 biochemical work. Shapes and sequences are simplified teaching examples. Recognition depends on more than a simple match. A double-strand break is not a completed genome edit.
Original research
A Programmable Dual-RNA-Guided DNA Endonuclease in Adaptive Bacterial Immunity
Martin Jinek, Krzysztof Chylinski, Inga Fonfara, Michael Hauer, Jennifer A. Doudna & Emmanuelle Charpentier · Science 337, 816–821 (17 August 2012) · 2012
Educational adaptation by Lesson Worlds. Not affiliated with the authors, Science or AAAS. The original publication may have its own access terms.