Biology / Unit 13 Bio 3371 short lesson, about 20 seconds
Induction and Morphogen Gradients
Captions available
The idea
Induction occurs when one cell group signals a neighboring group to change fate; a morphogen is a diffusing molecule whose gradient tells each cell which fate to adopt.
In practice
An organizer region induces neighboring embryonic tissue to form neural rather than skin structures.
Where people slip
Fate here depends on position within the gradient, not on any instruction intrinsic to the cell.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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