Zebrafish - Zygote Period

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The duration of this period is from 0 to 0.75 hours

  • It is here that there is a transition from one cell to two cells
  • Fertilisation occurs activating cytoplastimic movement
  • The animal poles within the cell segregate the blastodisc from the yolk cytoplasm

The Zygote Period. Drawn and designed by Sally Clarke based off referenced material

Here cytoplasm moves toward the animal pole to form the blastodisc, which is where future cell divisions will occur. The blastodisc then divides into 2 cells and this division continues occurring well into the cleavage stages.

Cleavage Period / Blastula Period / Gastrula Period / Segmentation Period / Pharyngula Period / Hatching Period / Larval Period / Home Page