Cell Cycle
Interphase (Growth Phase)
Synthesis P (S phase)
G2 Phase
G1 Phase
First stage after cell division
length of cycle varies tremendously
DNA replication
this is where abnormalities can be developed
lasts 3-5 hours
microtubules are synthesized
5-6 hours
Mitosis (Division Phase)
Prophase
first stage of division
Metaphase
Telophase
Cytokinesis
second stage of division
final stage of division
chromosomes become visible
Paired chromatids and the nuclear envelope disappears
chromosomes align in the equator of the cell
Anaphase
third stage of division
chromosomes move to opposite poles of the spindle.
chromosomes move to opposite ends of the cell and two nuclei are formed
the cell cytoplasm separate
eukaryotic cell divides into two daughter cells.
cell growth
Meiosis
two sex cells fuse together
exact replication of the original mother nucleus
Meiosis 1
Prophase 1 (5 stages)
3.Pachytene
4.Diplotene
2.Zygotene
5.Diakinesis
1.Leptotene
Chromosomes begin ro condence
each chromosome of one set finds and pairs with its equalivent
chromosomes become shorter and thicker
new combinations on each chromtid
chromosomes move away from each other
chromosomes become untangled and are paired only at the centromeres
Metaphase 1
spindle microtubules move to center of the cell
metaphase plate
Anaphase 1
Chromosomes separate completely
Telophase 1
cells divide into two cells
Meiosis II
4 haploid cells are formed
less common types of division in plants
coenocyte
algal or fungal containing several nuclei enclosed in a single membrane.
