BIOL 3P95 Final: BIOL 3P28-Final exam notes.docx

• School: Brock University
• Department: Biological Sciences
• Course: BIOL 3P95
• Professor: Robert Carlone

Document Summary

Blastomere = a cell derived from cleavage in an early embryo. The cavity within the blastula is the blastocoel. Blastocoel -- fluid-filled cavity forms in animal hemisphere of early amphibian and echinoderm, b/w the epiblast and hypoblast of avian, reptilian and mammalian. Convergent extension -- cells merge to narrow the tissue and to move it forward the sea urchin -- for elongation of the archenteron. Resumption of mitosis and cell division after fertilization by synthesis and degradation of cyclin b: promotes the formation of mitosis-promoting factor, and mpf promotes mitosis (highest during m) Degradation of cyclin b brings the cell back to s phase. G phases are added at the mid-blastula transition. Mpf composed of two subunits: cyclinb -- synthesis messages is due to egg cytoplasm mrna until the mid-blastula transition, cyclin-dependent kinase. Karyokinesis mitotic division of cell nucleus == mitotic spindle of tubulin. Cytokinesis division of the cell ==contractile ring of actin microfilaments, creates cleavage furrow.