SPAWN URCHINS

Detailed STILLS

ANIMATIONS:
Injecting KCL
MALE
FEMALE

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OBSERVE SPERM MOTILITY

ANIMATIONS:

SPERM 2D
SPERM 3D

Use a fairly high concentration of sperm to maximize viewing.

SPERM EVENTS

ANIMATIONS:

ACROSOME
'NO' STORY

JUST THE RIGHT AMOUNT OF SPERM

ANIMATIONS:

TOO LITTLE
TOO MUCH
JUST RIGHT

If too many sperm then you get Polyspermic Development.
Use a low concentration of sperm to fertilize eggs.

WHEN SPERM MEETS EGG

ANIMATION:

EARLY DEVELOPMENT

Upon activation the cortical granules fuse with the plasma membrane of the egg

TO CELL DIVISION

ANIMATION:

FERTILIZATION

Mitosis involves the division of the centrosome and chromosomes

by John Morill

VIDEOS (300K):

Illustrates:

NUCLEAR MIGRATION

The nucleus centering

1-4

First two divisions

ZYGOTA

Sea Studios video
of first division

LATER DEVELOPMENT

ANIMATIONS:

URCHIN (50K)
3D to PRISM (200K)
GASTRULATION
(107K)
Pluteus to juvenile (107K)

by John Morill