MitosisHow one cell becomes two

What is the purpose of Mitosis ?

Hint: How do little elephants grow up

to be BIG elephants?

How doES That CUT ON YOUR

FINGER HEAL ITSELF?

Mitosis…

Purpose: to make more cells

Two new cells are produced—just like the original

For Growth, Repair, and Replacement

Parent to Daughter Cell: Same DNA

Stages of MitosisInterphase

Most of a cells’ life is spent in Interphase

Interphase: “Inbetween”

Phase between mitosis stages Time for cell growth and

development Chemical changes leading to cell

division are taking place DNA replicates  (copied)

Prophase: “Packaging”• Chromosomes coil; become

shorter and thicker (joined at centromere)

• Nuclear membrane disappears• Centrioles form and move

away from each other—protein spindle fibers form

• Protein fibers attach to centrioles

Metaphase: “Middle”

Chromosomes pair up and line up in the center (or middle) of the cell. 

(Think: Metaphase = Middle)

Anaphase: “pull-Apart”

Chromosomes separate—pull on the spindle fibers—and move toward opposite sides of the cell—to the opposite poles. 

(Think: Anaphase = Apart)

Telophase: “Two cells”• New nuclear

membranes form around the chromosomes.

• Cytoplasm begins to divide—Cytokinesis.

• Two new cells are formed.

• Cell enters again into Interphase.

How can I possibly remember all of this?!

Interphase (in between)

Prophase (packaging DNA)

Metaphase (line up in middle of cell)

Anaphase (pull apart)

Telophase

I-P-M-A-TCytokinesis (two cells from one)