Mitosis

Our work on MITOSIS will cover the last focus point (yay!) for Patterns in Nature (syllabus pg28):

**__5. Maintenance of organisms requires growth and repair__**
> > > > > > >
 * Identify mitosis as a process of nuclear division and explain its role //(the focus of this wiki entry)//
 * Identify the sites of mitosis in plants, insects and mammals //(given on page 127 of the answers to the study summary questions)//
 * Explain the need for cytokinesis in cell division //(this is kind of obvious, once you get what mitosis is all about - again, given in the study summary answers)//
 * Identify that nuclei, mitochondria and chloroplasts contain DNA //(there you go, all these organelles have DNA! that was easy :-)//
 * Perform a first-hand investigation using a microscope to gather information from prepared slides to describe the sequence of changes in the nucleus of plant or animal cells undergoing mitosis //(we`ll hope to make some good slides of onion root tips or look at some pre-prepared ones... but we have a plan B, you can find it below)//

Okay... so,

MITOSIS:
What`s the big deal about mitosis? Here`s an **introduction** to put it in perspective.

media type="custom" key="5803511"

Here`s another **video overview**. Less wow factor, more content. And relevant because you`ll need to be able to identify the stages from diagrams/images and be able to explain what`s happening and why. //(again, an overview of the stages is given in the study summary answers)// The **essential study partner**. The process of mitosis is clearly outlined in the three links on this site, and you can click on the words that are defined to help you understand all the terms relating to mitosis. ** //Note that the links have multiple pages, you need to click on the icons in the bottom left corner of the screen to view them.//

Okay... so yes, it`s a good website (from which the previous three links came)... so now, on the website, click the ** Mitosis overview 1, Mitosis overview 2 , and Plant cell mitosis ** links on the left pane... can you match the terms and the stages correctly yet? If not, it may be time for some good old fashioned memorising (blagh).

//Image taken from: http://www.bio.miami.edu/~cmallery/150/mitosis/c12x5mitosis-collage.jpg//

Here are some more resources to help **DNA basics** **Mitosis**** //Note that you do not need to know the cell cycle in any detail//

Want more? If you follow this tutorial to the end, don`t get hung up on the multiple choice quiz questions - after all, how many multiple choice quizzes give you 9 (NINE!) possible responses to choose from!!!??? Better to try these quiz questions instead :-) Also, Cells Alive has this animation.

=> Think you could now say what can be observed in that incredibly high tech youtube above?

Plan B:
//For the first-hand investigation.//

The **Online Onion Root Tips**

And worksheet... More and more onion root tip cell images