The cell cycle
Mitosis is only one
section of the life cycle
of a cell.
Interphase is the main
part of the cell cycle.
This is where DNA is
replicated (a copy is
made) to prepare for
mitosis.
Overview
of mitosis
Interphase
Most of the cell cycle is spent in interphase.
During interphase the cell is growing and metabolic
activity is very high. DNA is in the form of chromatin.
Toward the end of interphase, new DNA is synthesized and
the chromosomes are replicated.
Prophase
•Chromosomes become condensed.
•Nuclear membrane disintegrates.
•Centrioles begin moving to the poles of the cell.
Metaphase
• Spindle fibres grow from centrioles to each chromosome
and attach at the centromere. (Attachment point for the
replicated sister chromatids.)
• Spindle fibres line up all the chromosomes to the equator
of the cell.
Anaphase
Spindle fibres pull on the sister chromatids, separating
them.
Telophase
• The chromatids have been separated to opposite ends of
the cell and a nucleus forms around each group.
• Cytokinesis begins.
prophase
interphase
Identifying the stages
telophase
anaphase
metaphase