Class 12 October 21, 2009

1

Model for developing Spemann’s organizer

Class 12 October 21, 2009

2

Cortical rotation

Class 12 October 21, 2009

3

http://worms.zoology.wisc.edu/frogs/fert/subcortrot/spotmove.html

Grey crescent formation

Class 12 October 21, 2009

4

Uv irradiation

Uv irradiation

Class 12 October 21, 2009

5

Rotation rescues uv ventralization

Double rotations

Class 12 October 21, 2009

6

Class 12 October 21, 2009

7

Beta-catenin is dorsally located

Class 12 October 21, 2009

8

Class 12 October 21, 2009

9