Cytokinesis Flashcards
What are the 4 kinds of cytokinesis?
Cleavage furrow, cell plate, budding and binary fission
Where does cleavage furrow occur?
In animals
Where does cell plate occur?
In plants
Where does budding occur?
In yeast and other fungi
Where does binary fission occur?
Bacteria, mitochondria and chloroplasts
How does cleavage furrow occur?
Mitosis then actin + myosin microfilaments form a ring around the edge of the plasma membrane, this pulls in the membrane as contracts due to connections in membrane and myosin slides past actin filaments the same way a muscle contracts
How does cell plate cytokinesis occur?
Mitosis then vesicles carrying cell wall and cell membrane components are delivered to plane of division, vesicle fuse and cell plate grows from centre outwards and cell wall forms alongside
What is budding cytokinesis?
An asexual form of reproduction in fungi where bulge emerges from one side of a cell before DNA replicates, spindle forms between bud and parent but scar is left once it separates
What is binary fission cytokinesis?
An asexual form of reproduction in prokaryotes and cannot be divided into mitotic phases as prokaryotes have no nucleus or centromere so not mitosis.
What are clones?
Organisms with identical genotype and are often produced by asexual reproduction
