BIOL 1001 Chapter : Biol1001 36852 1001 Biology Ex
Document Summary
Chapter 9: control of the cell cycle, 3 checkpoints, g1(restriction) checkpoint, g2 checkpoint, metaphase checkpoint, mitotic cell division, prophase, early prophase: Spindle apparatus forms microtubule organizing centers containing pair of centrioles. Spindle consists of microtubules between two: late prophase: Polar microtubules radiate toward the cell"s equator. Spindle microtubules capture chromosomes at centromeres: metaphase. Centrioles positioned at opposite ends (poles) of the cell. Chromosomes move to and align on the equator of the cell: anaphase. Movement of the chromosome is accomplished by depolymerization of the microtubules at the kinetochore. Cell begins to elongate because the polar microtubules grab onto each other and push the poles apart as they lengthen: telophase. Polar microtubules elongate (pushing out on the ends of the cells) helps cause the formation of the cleavage furrow. -by the end of telophase replication of the nucleus is complete and two genetically identical daughter nuclei are present: cytokinesis.
