10/30/14

Bell work:

What are the phases and stages of the cell cycle?

Announcements:

• FINISH SCIENCE FAIR EXPERIMENT!!!

• Tables & Graphs due Mon. 11/3

#8

Objectives:Students will graph data.

Students will identify the phases of cell cycle.

Students will explain how a cell divides.

Ch. 3.1 Cell Cycle & Cell Division

Instead of taking notes, check your worksheet.

(ADV: check your notes)

Focus Questions:

1. What are the phases of cell cycle?

2. What happens to the DNA during the cell cycle?

3. What happens during the mitotic phase?

4. Why is cell division important?

1. What are the phases of cell cycle?

During which part of cell cycle does a cell spend most of its life?

A. Mitosis

B. Interphase

C. Prophase

D. Metaphase

E. Telophase

F. Anaphase

G. Cytokinesis

Mito

sis

Inte

rphase

Prophas

e

Meta

phase

Telo

phase

Anaphase

Cytokin

esis

0 0 0 0000

45

1. What are the phases of cell cycle?

Cell cycle

Interphase

(growth & development)

G1 stage:

Rapid growth (some cells stop here)

S stage:

growth & DNA copied

G2 stage:

growth & storing energy for division

Mitotic phase

(cell division)

Mitosis:

Division of nucleus

Cytokinesis:

division of cytoplasm

Organ

elle

s rep

licate

Check the “Phases of the cell cycle chart”

Interphase

Animal Cell Plant Cell

Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

2. What happens to the DNA during the cell cycle?

1. Interphase – DNA is copied during S stage

2. DNA coils up into chromosomes

3. Identical chromosomes pair up to form a duplicated chromosome (with 2 sister chromatids)

Copy on the back

2. What happens to the DNA during the cell cycle?

4. During mitotic phase, sister chromatids will divide into 2 cells

Copy on the back

Draw this

What is the name for the coiled up DNA that are an X-shape?

A. Chromatid

B. DNA

C. Chromatin

D. Chromosome

Chrom

atid

DNA

Chrom

atin

Chrom

osom

e

0 000

45

3. What happens during the mitotic phase?

Prophase

Metaphase

Anaphase

Telophase

Cytokinesis

Mitosis

(nucleus &

DNA divides)

Cytoplasm & rest

of cell divides

Prophase

Animal Cell Plant Cell

Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

Spindle fibers

Centrioles

Metaphase

Animal Cell Plant Cell

Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

Anaphase

Animal Cell Plant Cell

Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

Telophase

Animal Cell Plant Cell

Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

Cytokinesis

Animal Cell Plant Cell

Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

Which of the following is NOT a part of mitosis?

A. Prophase

B. Metaphase

C. Anaphase

D. Telophase

E. Cytokinesis

Prophas

e

Meta

phase

Anaphase

Telo

phase

Cytokin

esis

0 0 000

45

4. Why is cell division important?

• Reproduction – unicellular organisms

• Growth & development

• Replacement – replaces old & worn out cells

• Repair – from injuries & other damage

Interphase

Prophase

Metaphase

Anaphase

Telophase

Cytokinesis