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Mitosis
Process of nuclear division in which chromosomes are distributed to two daughter nuclei
10
Anatomy
Undergraduate 2
01/16/2011

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Term
Interphase
Definition
period of a cells life when it carries out its normal metabolic activities and grows
Term
G1
Definition
happens during interphase
centrioles begin replicating
Term
S
Definition
happens during interphase
DNA is replicated
Term
G2
Definition
Happens during interphase
final preparations for mitosis are completed and centrioles finish replicating
Term
early prophase
Definition
chromatin condenses
sister chromatids held together at centromere
nucleoli dissapear, centrosomes seperate from one another (act as focal point for mitotic spindle, 2 centrioles)
microtubule arrays are called asters
Term
late prophase
Definition
nuclear envelope fragments
kinetochores - special protein structures at each chromosomes centromere form from growing microtubles. draws chromosomes to the exact center/equator of the cell
Term
metaphase
Definition
second phase of mitosis
centrosomes at opposite poles of cell
centromeres precisely aligned at the equator of the spindle (metaphase plate)
Term
anaphase
Definition
third and shortest phase of mitosis. anaphase begins abruptly as the centromeres of the chromosomes split simultaneously. each chromatid now becomes a chromosome.
Term
telophase
Definition
begins as soon as chromosonal movement stops. new nuclear envelope forms, spindle breaks down and dissappears
Term
cytokineses
Definition
completes division of cell into two identical daughter cells
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