Transcript Cell Division

Cell Division
Cell divison: the set up
• New Term for G1, S and G2 is
INTERPHASE
• Chromosomes replicate during
INTERPHASE
• M Phase is divided into four parts
PROPHASE
• Nuclear membrane breaks down
• Chromosomes come together so the identical
strands are side by side
• The strands are called CHROMATIDS
• Chromatids are attached to each other by a
CENTROMERE
• CENTRIOLES (in animals) move to opposite
sides of the cell to form the SPINDLE
METAPHASE
• Chromosomes attach to the spindle
• All are lined up in the center of the cell
• One chromatid is closer to one pole; the
other chromatid is closer to the other pole of
the spindle
ANAPHASE
• Centomeres split
• Duplicated chromosomes separate from
each other
• Chromosomes move apart and concentrate
in two groups at opposite poles of the
spindle
• Cytokinesis starts (division of the
cytoplasm)
TELOPHASE
• Microtubules in the spindle break down
• Nuclear membrane forms around each
cluster of chromosomes
• Cytokinesis is finished
• In plant cells a cell plate grows between the
cells as part of cytokinesis