2/9/15 Starter: copy and answer the following question 2/9/15 169 73 Connection/ Exit: Thinking about the starter, were you correct? How is your answer.

2/9/15

Starter: copy and answer the following question

2/9/15

16973

Connection/ Exit:Thinking about the starter, were you correct? How is your answer different or the same? 

Mitosis Notes

What process produces new cells?

Practice/ application:Glue notes here when done

170Mitosis Notes

February 9,2015

AGENDA

Objective 7.12 F recognize that according to cell theory all organisms are composed of cells and cells carry on similar functions such as extracting energy from food to sustain life by completing mitosis poster.

1. Starter2. Practice3. Exit

1/23 Characteristics of Living things 149-1501/26 Levels of Organization 151-1521/27 Unicellular Microscopy 153-1541/28 Is it living? 155-156 1/29 Cell Theory Notes 157-158 1/30 Cell Notes 159-160 2/2 Plant/Animal Cell Comparison 161-1622/3-4 Organelle Trail Research and Poster 163-1642/5 Cell State 165-166 2/6 Cell Comparison Booklet 167-1682/9 Mitosis Notes 169-170

Table of Contents

2/9/15

Starter: copy and answer the following question

2/9/15

16973

Connection/ Exit:Thinking about the starter, were you correct? How is your answer different or the same? 

Mitosis Notes

What process produces new cells?

Practice/ application:Glue notes here when done

170Mitosis Notes

How do little elephants grow up to be BIG elephants?

Why do animals shed their skin?

The process is

Mitosis the process in which the nucleus divides to form

two new nuclei.

The process of asexual reproduction begins

after a sperm fertilizes an egg.

Three reasons why cells reproduce by asexual reproduction:

1. Growth 2. Repair 3. ReplacementSkin cancer - the abnormal growth of skin cells - most often develops on skin exposed to the sun.

Cell that reproduce by asexual reproduction reproduce constantly.

There are 6 stages to Mitosis:

• Interphase

• Prophase

• Metaphase

• Anaphase

• Telophase & Cytokinesis

Interphase occurs before mitosis begins

• Chromosomes are copied (# doubles)• Chromosomes appear as threadlike coils

(chromatin) at the start, but later change to sister chromatids at end of this phase

CELL MEMBRANENucleus

Cytoplasm

Interphase

Animal Cell Plant Cell

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

Prophase 1st step in Mitosis

• Mitosis begins (cell begins to divide)• Centrioles (or poles) appear and begin to

move to opposite end of the cell. • Spindle fibers form between the poles.

CentriolesSister chromatids

Spindle fibers

Prophase

Animal Cell Plant Cell

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

Spindle fibers

Centrioles

Metaphase 2nd step in Mitosis

• Chromatids (or pairs of chromosomes) attach to the spindle fibers.

Centrioles

Spindle fibers

Metaphase

Animal Cell Plant Cell

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

Anaphase 3rd step in Mitosis

• Chromatids (or pairs of chromosomes) separate and begin to move to opposite ends of the cell.

Centrioles

Spindle fibers

Anaphase

Animal Cell Plant Cell

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

Telophase 4th step in Mitosis

• Two new nuclei form. • Chromosomes appear as chromatin

(threads rather than rods).• Mitosis ends.

NucleiNuclei

Chromatin

Telophase

Animal Cell Plant Cell

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

Cytokinesisoccurs after mitosis

• Cell membrane moves inward to create two daughter cells – each with its own nucleus with identical chromosomes.

Animal Mitosis -- Review

Interphase

Prophase

Metaphase

Anaphase

Telophase

Interphase

Plant Mitosis -- ReviewInterphase

Prophase

Metaphase

Anaphase

Telophase

Interphase

Mitosis Animation

http://www.cellsalive.com/mitosis.htm

26

- Cell Division

The Cell Cycle

26

27

Cell Cycle

2/9/15

Starter: copy and answer the following question

2/9/15

16973

Connection/ Exit:Thinking about the starter, were you correct? How is your answer different or the same? 

Mitosis Notes

What process produces new cells?

Practice/ application:Glue notes here when done

170Mitosis Notes