BIOL 111 Lecture Notes - Lecture 19: Cleavage Furrow, Cytokinesis, Cell Plate
21 Oct 2016
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Document Summary
In animal cells cytokinesis occurs by a process known as cleavage, forming a cleavage furrow (balloon and string example) In plant cells, during cytokinesis a cell plate forms. Prokaryotes bacteria: do not go through mitosis, reproduce by a type of cell division known as binary fission. Since prokaryotes proceed eukaryotes by billions of years it is likely that mitosis evolved from bacterial cell division. Certain protists, diatoms and yeasts exhibit types of cell division that seem intermediate between binary fission and mitosis carried out by most eukaryotic cells. The cell cycle is regulated by a molecular control system. The frequency of cell division varies with the type of cell. These cell cycle differences result from regulation at the molecular level. Molecules present in the cytoplasm regulate progress through the cell cycle. The sequential events of the cell cycle are directed by a distinct cell cycle control system, which is similar to a clock.
