mitosis
Download
Skip this Video
Download Presentation
Mitosis

Loading in 2 Seconds...

play fullscreen
1 / 17

Mitosis - PowerPoint PPT Presentation


  • 116 Views
  • Uploaded on

Mitosis. Biology I G/T. Why do cells divide?. To make a new organism Growth Repair Replacement of normal cell loss Development. Structure of the Mitotic Chromosome Showing Sister Chromatids, Centromeres, and Spindle Fiber Attachment. Chromatid – ½ of a chromosome

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Mitosis' - skah


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
mitosis
Mitosis

Biology I G/T

why do cells divide
Why do cells divide?
  • To make a new organism
  • Growth
  • Repair
  • Replacement of normal cell loss
  • Development
slide3
Structure of the Mitotic Chromosome Showing Sister Chromatids, Centromeres, and Spindle Fiber Attachment

Chromatid – ½ of a chromosome

Sister chromatid – each half of the same chromosome

Centromere – complex of proteins attached to DNA holding the sister chromatids together

stages of mitosis
Stages of Mitosis

S Stage

Interphase

interphase
Interphase

Animal Cell

Interphase is not part of mitosis – it is the time between cell divisions

Interphase includes G1, S, and G2

During interphase the cell is doing its normal metabolic activities like protein synthesis

The cells are performing their duty as part of a tissue

The DNA duplicates to get ready for mitosis

The DNA is in chromatin form

Plant Cell

prophase1
Prophase

Animal Cell

The chromatin begins to condense into chromosomes and become visible in the nucleus

The nuclear membrane begins to break down

Centrosomes duplicate, form spindles, & move to the poles

Spindle fibers attach to the chromosomes begin moving

Plant Cell

metaphase1
Metaphase

Plant Cell

Animal Cell

The chromosomes are lined up down the equator by the spindles

anaphase1
Anaphase

Animal Cell

The sister chromatids separate at the centromeres

Each chromatid (now called a chromosome) heads to the pole of the cell

Plant Cell

telophase
Telophase

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

telophase1
Telophase

Animal Cell

The chromosomes are completely to the opposite poles

New membranes start to form around the DNA

The chromosomes begin to decondense back to chromatin

Cytoplasm begins to pinch in animal cells and a cell wall begins to form in plant cells – This is cytokinesis

Plant Cell

slide14

After telophase is complete, the cells reenter interphase and go about their normal business

The DNA is totally decondensed, new nuclei reformed, and there are totally 2 new cells

Interphase

differences plant vs animal cell mitosis
Differences Plant vs. Animal Cell Mitosis

Cytokinesis in a plant cell

Plant cells do not have centrioles in their centrosomes but animal cells do ?????

Plant cells cannot pinch in due to the cell wall – a new cell wall forms down the middle from the endoplasmic reticulum

Plant cells divide slower due to having to reform the cell wall

Cytokinesis in an animal cell

mitosis quiz animal cells
Mitosis Quiz – Animal Cells

Interphase

Metaphase

Anaphase

Interphase

Prophase

Telophase

mitosis quiz plant cells
Mitosis Quiz – Plant Cells

Metaphase

Telophase

Anaphase

Interphase

Prophase

Interphase

http://biology.nebrwesleyan.edu/benham/mitosis/

ad