aka cell differentiation

Creating assymetry

• Asymmetric division of Stem cells
• SYmmetric division, but Cell signaling causes asymmetry
  • Positive feedback
  • Cell fate induction. Some cells which have specialized can send a signal that makes other cells around specialize. –> Sequential induction
  • Morphogen gradients. Turn gradients of information through Gene expression regulation to different types of cells.

Organizer

A group of cells that organizes early development.

From GEB

The process by which one initial cell replicates over and over, giving rise to a myriad of differentiated cells with specialized functions, can be likened to the spread of a chain letter from person to person, in which each new participant is asked to propagate the message faithfully, but also to add some extra personal touch. Eventually, there will be letters which are tremendously different from each other.

Nice computer program example given on page 546