Cell Cycle
3 Major Parts
(Interphase/Mitosis/Cytokinesis)
Interphase: The majority of time a cell is
in interphase. This is the time of regular
growth and function of a cell. There are 3
stages in interphase.
1. G-1 Growth
2. S Synthesis = DNA replication. The
cell makes an exact copy of its DNA.
3. G-2 Growth and Preparation for
Mitosis and Cell Division.
Mitosis
A. Process during cell division during
which the nucleus divides into 2
nuclei.
B. Each nuclei will have the same
number and type of chromosomes.
C. Genetically, the cells are the same.
D. Divided into 4 steps
E. Study Fig. 10-8 pp. 282-283 and
figure 10-13 p. 285
1. Prophase
Chromosomes coil up and become
visible.
Nuclear membrane breaks down
(falls apart)
Interphase
Prophase
2. Metaphase
Chromosomes (chromatids) line up
at the equator.
Metaphase: they meet in the
middle.
Metaphase
3. Anaphase
Chromatids are pulled apart at the
centromeres.
They go to opposite ends of the cell.
Anaphase
4. Telophase
1. Nuclear membranes form around
chromosomes making 2 nuclei.
2. Chromosomes uncoil.
3. Cytokinesis begins.
Telophase
Cytokinesis
Actual division of cells.
In animals, the cell membrane is
pinched in half by proteins.
In plants, a cell plate divides the
plant cell, and new cell walls form
on each side of the plate.
Mitosis Lab
Part 1: Plant Cell Mitosis
Part 2: Animal Cell Mitosis
Interphase
Later Prophase
Metaphase
Anaphase
Telophase

SUE – MITOSIS
http://www.cellsalive.com/mitosis.
htm
http://www.uoguelph.ca/zoology/d
evobio/210labs/mitosis1.html
Onion Root Tip Mitosis -- Review