Summary: movies on the left show a C. elegans embryoG dividing from 1-cell to 4-cell stage. Their matching animations are on the right. Please note that the developmental timing of the real embryo (left) and the animation (right) does not match perfectly.

From a zygoteG to meeting pro-nucleiG rotation
( 2.6 MB, movie length: 21") (400 KB, movie length: 23")


From meeting pro-nucleiG rotation to the cell membraneG pinching-in
(1.5 MB, movie length: 11") (315 KB, movie length: 28 ")


From the cell membraneG pinching-in to two-cell embryo
(3.4 MB, movie length: 28") (355 MB, movie length: 17")


From two-cell embryo to four-cell embryo
(3 MB, movie length: 27") (620 KB, movie length: 21")


1. Matching Real Embryogenesis (movie on the left): Haining Zhang, John White Lab.


Embryo: the early developmental stage of an organism (C. elegans in this case) after fertilization and before hatching.

Membrane: permeability barrier surrounding cells or organelles and consists of a phospholipids bilayer, together with associated membrane proteins.

Pro-nuclei: one of two haploid nuclei in a newly fertilized embryo (one maternal and one paternal). (The Cell – A Molecular Approach. Geoffrey M. Cooper 1997)

Zygote: a fertilized egg; diploid cell resulting from fusion of a male and female gamete. (Molecular Cell Biology/Harvey Lodish [et al.] – 4th)