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Mitosis Overview
Next Generation: HS.LS1.4 NGSS

Mitosis Overview

Author: Nathan Lampson

This lesson will identify the the function of mitosis and describe why it is an important process in our bodies.

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Terms to Know

The third phase of mitosis in which sister chromatids are separated and pulled by spindle fibers toward opposite poles of the cell.

Cell Cycle

Describes the events that occur from the time a cell is formed until it divides.


The point at which sister chromatids are attached to one another.

Cleavage Furrow

The pinching off of the plasma membrane to produce two new cells.


The end result of mitosis in which two diploid daughter cells are produced which are identical to the parent cell.

Daughter Cells

The name for cells produced by the process of mitosis.


Cells that contain two copies of each chromosome.

G1 Phase

The portion of interphase in which a cell grows in size.

G2 Phase

The portion of interphase in which a cell makes final preparations for cell division.


A phase of the cell cycle in which a cell carries out its normal functions; includes all parts of a cell’s life except for when the cell is dividing.


The second phase of mitosis in which chromosomes line up on the metaphase plate and are attached at the centromere to spindle fibers.


The first phase of mitosis in which chromosomes are condensed, the nuclear membrane breaks down and centrioles begin to move toward opposite poles.

S Phase

The portion of interphase in which a cell’s DNA is copied.

Sister Chromatid

A duplicate of an original chromosome produced during mitosis.


The final phase of mitosis in which the plasma membrane begins to pinch off and the nuclear membrane begins to reform. Chromosomes begin to return to their thread-like state.