Zebrafish - Cleavage Period: Difference between revisions
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[http://php.med.unsw.edu.au/embryology/index.php?title=2009_Group_Project_3#Timeline_and_Stages_of_Embryonic_Development | |||
[http://php.med.unsw.edu.au/embryology/index.php?title=Zygote_Period Zygote Period] / [http://php.med.unsw.edu.au/embryology/index.php?title=Blastula_Period Blastula Period] / [http://php.med.unsw.edu.au/embryology/index.php?title=Gastrula_Period Gastrula Period] / [http://php.med.unsw.edu.au/embryology/index.php?title=Segmentation_Period Segmentation Period] / [http://php.med.unsw.edu.au/embryology/index.php?title=Pharyngula_Period Pharyngula Period] / [http://php.med.unsw.edu.au/embryology/index.php?title=Hatching_Period Hatching Period] / [http://php.med.unsw.edu.au/embryology/index.php?title=Larvae_Period Larvae Period]] / [http://php.med.unsw.edu.au/embryology/index.php?title=2009_Group_Project_3#Timeline_and_Stages_of_Embryonic_Development Home Page ] | |||
Revision as of 04:32, 24 September 2009
The duration of this period is from 0.75 to 2.25 hours
- The transition during this period is from two cells to 64 cells
- These transitions occur Rapidly and Synchronically
- After the first cleavage the blastomeres division is approximately every 15 minutes; There are six cleavages during this period
- A vertical furrow forms but when it reaches the end of the blastodisc, it become horizontal, and partially cleaves the zygote cell from the yoke cell, This is known as meroblastic divisions
- Thus the cells remain interconnected by cytoplasmic ‘bridges’.
During this period the blastomeres, which are the dividing cells singularly known as blastodisc, divide equally about every 15 minutes.
Zygote Period / Blastula Period / Gastrula Period / Segmentation Period / Pharyngula Period / Hatching Period / Larvae Period] / Home Page
