1
SPAWN URCHINS
Detailed STILLS
ANIMATIONS:
Injecting KCL
MALE
FEMALE
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2
OBSERVE SPERM MOTILITY
ANIMATIONS:
Use a fairly high concentration of sperm to maximize viewing.
3
SPERM EVENTS
ANIMATIONS:
4
JUST THE RIGHT AMOUNT OF SPERM
ANIMATIONS:
If too many sperm then you get Polyspermic Development.
Use a low concentration of sperm to fertilize eggs.
5
WHEN SPERM MEETS EGG
ANIMATION:
Upon activation the cortical granules fuse with the plasma membrane of the egg
6
TO CELL DIVISION
ANIMATION:
Mitosis involves the division of the centrosome and chromosomes
VIDEOS (300K):
Illustrates:
The nucleus centering
First two divisions
Sea Studios video
of first division
7
LATER DEVELOPMENT
ANIMATIONS:
URCHIN (50K)
3D to PRISM (200K)
GASTRULATION
(107K)
Pluteus to juvenile (107K)
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