HAPPY MONDAY Bellwork: Draw and fill in the missing blanks with the following words

G1 Phase G2 PHASE S PHASE M PHASE

G1 PHASE

S PHASE

G2 PHASE

M PHASE

G1, S, AND G2 = INTERPHASE

Last two phases of the cell cycle:

M phase (mitosis)

and

Cytokinesis.

Mitosis (M phase): division of the

nucleus

Cytokinesis: the cytoplasm divides and

2 new identical cells are produced

Mitosis is divided

into four phases:

prophase,

metaphase,

anaphase, and

telophase (PMAT).

Chromosome – draw this

Prophase: chromosomes (coiled DNA) are visible and the nuclear

envelope is gone.

DRAW THIS!

nucleus

chromosomes

Metaphase, the chromosomes line up across

the center (middle) of the cell.

Anaphase: the sister chromatids split and the

chromosomes move away into two groups

near the poles of the cell.

So, each chromosome consists of 2

identical sister chromatids.

DRAW THESE!

Sister chromatids

chromosomes

Telophase: the nuclear envelopes reappear to form two new nuclei

(nuclei = more than 1 nucleus)

DRAW THIS!

Nuclei

…cell division is not complete after telophase…

Cytokinesis: division of the cytoplasm, two identical cells produced

1 2 3 4 5

6 7 8 9 10

Prophase Metaphase Anaphase Telophase

P M A T

Always remember…

Let’s practice…

• On the back of your page, number 1-5.

• On the next slide, you will see 5 pictures.

• You need to figure out what phase each one is in and write it down.

1 2

34

5

Card Sort

• Place the “CELL CYCLE” card in the middle of your table.

• Place the numbered picture cards in a circle around it, in the order you think they belong.

• Place the description cards with the pictures you think they are describing.

• As we go through the PowerPoint, make corrections as needed and place the phase names in their proper order.

Cancer

What is cancer?Uncontrolled cell growth.

What is cancer?

Cancer is a disorder in which some cells lose the

ability to control growth (cell division).

The cell cycle has broken down and does not

function properly.

How does cancer happen?

1. Cancer cells divide uncontrollably2. These cells form masses of cells called tumors3. Tumors damage surrounding (healthy) tissue

How does cancer affect your body?

After a certain point, cells from the tumor get loose and spread throughout an organism’s body. This is called metastasis.

What can cause cancer?

Cancer can be caused by

1. tobacco

2. radiation (genetic mutations)

3. viral infection.