BELL WORK: Foldable Time!

• Fold your paper window style.• Write Interphase on

one side and Mitosis on the other.

G1 Phase

S Phase

G2 Phase

*DRAW this in the center

section of your

foldable*

JOURNAL PAGES

• Page: 41• Title: Amoeba Sisters: Mitosis (HW 11)• Date: 11-3-14• Yes, Cornell Notes!

• Page: 42• Title: Cell Cycle• Date: 11-3-14• Essential Question: What happens during the cell

cycle?• No Cornell Notes!

Homework Tonight!

• On YouTube, search “Amoeba Sisters Mitosis”– Write down the title NOW or take a picture

of it

• Or, go to my website and find tonight’s homework assignment

• Complete Cornell Notes while watching! (on page 41)

*under your circle*

Cell division: process where a cell grows & divides into two identical

daughter cells

*above your circle*

Cell Cycle: series of events that cells go through

to grow & divide• Made up of two major phases: Interphase &

M Phase (Mitosis)• Used for organism growth and damage repair• Results in 2 identical cells

*the next four slides go on the back of the Interphase flap*

Interphase:• Majority of a cell’s life• Includes 3 phases (G1, S, G2)

G1 phase: grow, make proteins, make new organelles

S phase: DNA is

replicated (copied)

Reminder…

WHY does the DNA have to replicate before

the cell divides?

G2 Phase: organelles & proteins

required for division are produced

When the G2 phase is complete, the cell

is ready to divide.

Checkpoints: points when the cell checks for problems

Last two phases of the cell cycle:

M phase (mitosis)

and

Cytokinesis

*everything else goes on the back of the Mitosis flap*

Mitosis (M phase): the nucleus

divides

*PMAT*

*divided into four phases:

prophase,

metaphase,

anaphase, and

telophase

Prophase: chromosomes become visible, the centrioles separate to opposite sides of the cell,

the chromosomes attach to the spindle, the nucleolus disappears, nuclear envelope breaks

down

DRAW THIS!

The centrioles are two tiny structures

located in the cytoplasm that help

organize the spindle.

The spindle is a fanlike microtubule

structure that helps separate the

chromosomes.

Metaphase: chromosomes line up in the

center of the cell

Anaphase: the centromeres joining the sister

chromatids split and chromosomes move

away to opposite sides near the poles of the

spindle.

DRAW THESE!

Telophase: the chromosomes begin to disperse, nuclear envelopes reappear to

form two new nuclei

(nuclei = more than 1 nucleus)

DRAW THIS!

…cell division is not complete after telophase…

Cytokinesis: division of cytoplasm, two identical cells produced