3 1 cell cycle overview (k)

Ch. 3.1 Cell Cycle & Cell Division

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?

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

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)

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

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

Cell Cycle Sort

• Separate into 3 piles: terms, definition, & pictures

• Put the pictures into the correct order

• Match the definitions to the pictures

• After, use your book (pg. 90-91) to check the order and to add the terms

• Create a 6-tab foldable:– Outside of tab: Draw picture

– Inside of tab: Write term with definition

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

4. Why is cell division important?

• Reproduction – unicellular organisms

• Growth & development

• Replacement – replaces old & worn out cells

• Repair – from injuries & other damage