Eukaryotic Cell Reproduction
Interphase, Mitosis, and Cytokinesis
Interphase

Cell is carrying out all life functions plus
storing energy for mitosis

Each chromosome is duplicated which
forms chromatids

Chromatids: identical copies of a
chromosome, held together at
centromere
Prophase

1st phase of Mitosis

Nuclear membrane dissolves

Chromosomes condense and start to move
towards center of cell

Centrioles move to opposite sides of cell

Mitotic spindle fibers form between the
centrioles
Metaphase
 2nd
Stage of Mitosis

Mitotic spindle fibers attach to the
centromeres of each pair of
chromosomes

The chromosomes are lined up along the
equator of the cell
Anaphase
 3rd
Stage of Mitosis

Chromatids separate at the centromere

Each chromatid is pulled to a pole of the
cell by the mitotic spindle fibers
Telophase

Last Stage of Mitosis

Nuclear membranes form around the two
sets of chromosomes

Chromosomes unwind

Mitotic fibers disappear

Mitosis is now complete
Cytokinesis

Eukaryotic cells without a cell wall, cell
membrane pinches inward and eventually
all the way through to form the two
daughter cells

In eukaryotic cells with a cell wall, a cell
plate forms in the middle of the cell to
divide the two cells.
What Did You Learn?

How are binary fission and mitosis
similar? How are they different?

Why is it important for chromosomes to
be copied before cell division?

What would happen if cytokinesis
occurred without mitosis?