Homework from last class:Homework from last class:Complete ‘Identifying stages of the

cell cycle’ (p. 71 of the worksheet)Answer Reading Check questions 1-6

(p. 155)Complete student questionnaireBring field trip forms and $Read over class notes and check out the

class blog: http://msoonscience.blogspot.com/

Identifying stages of the Identifying stages of the cell cyclecell cycle

Use the following vocabulary works in the box above to label the stages of the cell cycle in the following diagram:

continued growth and preparationcytokinesisreplication

growth and preparationinterphasemitosis

1.

2.

Growth and preparation

Replication

3.

Continued growth and preparation

4.

Mitosis

5.

Cytokinesis

6. Interphas

e

Briefly describe what is occurring in each stage of the cell cycle:1.

2.

3.

4.

5.

6.

Growth and preparation: Cells grow and carry out life functions.

Replication: The nucleus makes a copy of its DNA.

Continued growth and preparation: There is continued growth and preparation for mitosis.

Mitosis: The nucleus of the cell divides into 2 equal and identical parts.

Cytokinesis: The 2 equal, identical parts of the cell separate.

Interphase: Cells grow and carry out their life functions.

http://msoonscience.blogspot.com/

Ms. Soon’s Science Site:Science 9 Class Blog:

MitosisMitosisChapter 5.1: The Cell Cycle and Mitosispp. 155-156

Mitosis

Note:Note:Terms in green are definitions

– these are key terms to know

Terms in blue are important words or concepts – please make note

Introduction to MitosisIntroduction to MitosisBC Science 9 Site: Unit 2 -

Reproductionhttp://www.bcscience.com/bc9/pgs/

v_animate_001_mitosis.html

Mitosis animatio

n

MitosisMitosisWhat is mitosis?mitosis: the second and shortest stage of the cell cycle; the process in which the duplicated contents of the cell’s nucleus divides into two equal partsoccurs in order for organisms to grow and develop

What is the end result of mitosis?2 daughter nuclei, each with the same number and kinds of chromosomes as the original cell.

sister chromatids: formed when DNA replicates during interphase and joined together by a centromere.

centromere: the structure that joins two sister chromatids together.

p. 156

1) Early prophase

2) Late prophase

3) Metaphase

4) Anaphase

5) Telophase

Phases of Phases of MitosisMitosis

p. 156-157

1) Early prophase1) Early prophaseReplicated chromosomes coil up into

an ‘X’ and become visible under a light microscope

Nucleolus disappearsNuclear membrane begins to break

downSpindle fibers (tiny tube-like structures

made of protein) begin to form in plant and animal cells

2) Late prophase2) Late prophaseSpindle fibers complete forming.Chromosomes attach to the spindle fibers

at their centromeres.Nuclear membrane disappears.

spindle fibers

centromere

3) Metaphase3) MetaphaseSpindle fibers tug X-shaped

chromosomes.The duplicated chromosomes line up

across the middle of the cell.

Chromosomes at the equator

4) Anaphase4) AnaphaseThe duplicated chromosomes move

apart to opposite ends of the cell.Pole

5) Telophase5) TelophaseA nuclear membrane

forms around the chromosomes at the opposite ends of the dividing cell.

One complete set of chromosomes now at each pole of the cell.

Spindle fibers begin to disappear.

A nucleolus appears within each nucleus.

Cell is now ready to divide.

Nucleolus

Nuclear membran

e

Review – Name that Review – Name that phase!phase!

Prophase

(Good job!)

Review – Name that Review – Name that phase!phase!

Anaphase

(Great!)

Review – Name that Review – Name that phase!phase!

Metaphase

(Yes!)

Review – Name that Review – Name that phase!phase!

Telophase

(Woo hoo!)

SummarySummary

Mitosis:1 parent cell 2 daughter cells

Mitosis occurs regularly in tissues that require new cells.

Mitosis allows for an organism to grow and develop over its lifespan and replenishes dead or dying cells in certain tissues.

Project: Mitotic Movies!

““Stages of the Cell Cycle” Stages of the Cell Cycle” worksheetworksheet

NOTE: The blanks did not get copied into your worksheet. Please add the following shaded-in boxes:

Name of Cell Cycle Stage Cell Activities Nucleus Activities

Interphase

Growth and preparation

Replication

Continued growth and preparation

Mitosis

Early prophase

Late prophase

Metaphase

Anaphase

Telophase

Stages of the Cell Cycle (BLM 2-11 worksheet)

Homework for next class:Homework for next class:Complete the Mitosis, Stages of the Cell

Cycle, and The Cell Cycle worksheets from the handout

Study for Quiz on Ch. 5.1 – The Cell Cycle and Mitosis (pp. 150-156)

Inform me of your Mitotic Movies groupBring field trip forms and $Read over class notes and check out the

class blog: http://msoonscience.blogspot.com/

Works CitedWorks CitedImages taken from the following sources:http://voices.washingtonpost.com/comic-riffs/2008/12/

the_morning_line_gary_larsons.html

http://www.hmhbooks.com/booksellers/press_release/studentscience/mtor.shtml

http://www.bcscience.com/bc9/pgs/v_animate_001_mitosis.html

http://notabletv.com/2010/events/calgary-international-film-festival/

http://all-free-download.com/free-vector/vector-clip-art/glossy_tv_clip_art_10392.html

http://www.biology.iupui.edu/biocourses/N100/2k3ch8mitosisnotes.html