MITOSIS

MAJID KHAN - 4th PERIOD

BIOLOGY (H) - MRS.NETRI

General Description.Mitosis is the fourth stage of the cell cycle.

Includes the processes mitosis and

cytokinesis. During mitosis, the cell’s nucleus and its

contents divide. The nuclear membrane

dissolves, the duplicated DNA condenses

around the proteins and separates, and two

new nuclei form. During cytokinesis, the cells cytoplasm

divides, resulting in two daughter cells

genetically identical to the original cell.

STEP

S O

F

MIT

OSIS

InterphaseProphaseMetaphaseAnaphaseTelophaseCytokinesis

INTER

PH

ASE

The longest stage of a cells life. Produces all

materials required for growth. Preparation for

division also occurs. During this phase the cell

continues to grow. Functions of the cell are being

carried out in the cell. Chromatin is uncoiled and the

nuclear membrane can be visible as long with the

nucleolus.

Pro

phase

In this stage, the chromosomes (DNA) in

the cell become visible, and duplicate.

Spindle fibres start to form. While this

happens the nucleolus dissolves. The

nuclear membrane breaks apart.

Late

Pro

phase

Spindle fibres have now completed

forming. Those fibres attach to the

centromeres, while this happens the

nucleus has disolved..

Meta

phase

In this stage, the chromosomes get

tugged by the spindle fibres into a

horizontal straight line. The nuclear

membrane is completely gone. The

DNA chromosomes get lined up.

Anaphase

In this stage, the spindle fibres pull apart the

chromosomes. In result, half of each

chromosomes is on the opposite side of the cell.

Telo

phase

During this stage, the nucleus and

membrane begins to form. The

nucleolus is visible. The spindle fibres

start to dissolve. And two daughter cells

are connected.

Cyto

kin

esis

This is the final stage of the cell cycle.

During this stage, the two nuclei

separate into two individual daughter

cells, with separate nucleus and DNA.