Amphibian Research Group, Univ of
Newcastle
3 hr 45 min PI: 4 hr PI: blastula 4 hr 30 min PI:
early blastula late blastula
Embryonic development in Lim.
tasmaniensis IVF controls.
Time = 1-4 hr
30 min PI.
In normal embryonic development cleavage
furrows form perpendicular to the original cleavage
furrow and produce symmetrical cells. As cellular divisions
occur, cells increase in number and decrease in size. From 16 cells,
divisions at the animal pole occur ahead of divisions at the vegetal pole
(blastula).
1 hr PI: Zygote 1 hr 45 min PI: 2 cell 2 hr 15 min PI: 4 cell
(polar body pit,
circle)
2 hr 45 min PI: 8 cell 3 hr 15 min PI: 16 cell 3 hr 30 min PI: 32 cell
Spotted
Grass Frog
Embryos:
Danielle
Herbert
(Univ
Newc.)