Main Page
  Products
  Testimonials
  Education
  Questions
  Information
  E-mail

Helpful Hints...


...from Professor K. T. Vision


Printing Information
Please feel free to print
any of the lesson plans
you wish.  Use the following
page settings to print the
entire page(s):

Top = .5"
Bottom = .75"
Left = .5"
Right = .5"


Did You Know...

Many of the experiments
in the "Scoping Things Out"
lab activity book may be
captured and projected with
your  Video Flex®
!


Innovative Ideas...

Try using your
Discovery Scope Kit--
you'll be amazed at all the
different uses.  Capture
images from 35mm slides,
specimens from a petri
dish, a "Bug" box or
watertight Bio-bag!



lesson plans microscope Microprojector lab activity book science experiments  blood typing antibody Rh factor antigen red blood cells

Ken-A-Vision's
"Scoping Things Out"
Lab activity book

LESSON #13: "Going Through A Phase" (Posted February,1999)
Objective: To further understand the process involved in cellular reproduction.
Suggested materials: Vocabulary:
  Microprojector   Mitosis
  Onion   Interphase
 Prepared slides   Prophase
  Metaphase
  Anaphase
  Telophase
  Daughter cells
NOTES TO THE TEACHER:
1. A thin piece of onion skin can be used to observe organelles in plant cells.  Carefully peel a thin strip of onion and place on a slide, stain with iodine.  One or two drops are sufficient.   (Iodine can be purchased in any drug store.)
2. Place the slide on the microprojector for viewing and search for organelles such as nucleus of the cell.
3. Prepared slides can be used to study the changes which occur during mitosis:  compare the chromatin of the surrounding cells with the chromosomes of the dividing cells using a prepared slide of an onion root tip.
4. Also observe the prepared slides and discuss the phase of mitosis which some of the cells are undergoing.   Compare and contrast the cellular structures in the various phases of mitosis.
ENRICHMENT
1. Have students draw and label the various stages of mitosis.
2. Divide the students into lab groups.  Suggest three-dimensional diagrams to students using edible and non-edible materials showing mitosis.  Each group can then show and discuss their diagram with the class.
3. Investigate the role of DNA in living cells through library resources.
4. Have students draw and label stages of mitosis on index cards.  When the cards are flipped, the cells appear to go through mitosis.
ACTIVITY:   "Going Through A Phase"
Cellular Reproduction
PURPOSE:  Observe the various stages of mitosis on prepared slides as well as slides prepared by the student.
PROCEDURE:
1. A thin piece of onion skin can be used to observe organelles in plant cells.  Carefully peel a thin strip of onion and place on a slide, stain with iodine.  One or two drops are sufficient.  (Iodine can be purchased in any drug store.)
2. Place the slide on the microprojector for viewing and search for organelles such as nucleus of the cell.
3. Observe the commercially   prepared slides (available from Ken-A-Vision) showing the various stages of mitosis.
a.  What organelles stand out in the stain?
b.  Draw each stage of mitosis from the slides and label the structures of the cell.
  c.  What changes take place in the chromatin as the cell divides?
d.  Where is the DNA found in the cell?
e.  Carefully study the cells.
f.  Locate cells undergoing mitosis by looking for partially divided pairs of    cells.  How do these dividing cells compare with those not undergoing        mitosis?
g. Trace several examples of various phases of cell division of the dividing cells.
CONCLUSION:
1. Each lab group should show the slides which they prepared to the class using the Microprojector.
2. What factors cause a cell to divide?
3. How do you know cells are dividing?
4. Are the daughter cells exactly alike after mitosis?


STAY TUNED...
MORE ADVENTURES TO FOLLOW NEXT MONTH

"A Fine Development" (Algae:  The growth and development of simple plants)

 

| | | | | |

Internet Hosting
provided by:


Internet Consulting
Group, Inc

Maintained by ken-a-vision® WEB Designer
©1996 Ken-A-Vision® Manufacturing Co., Inc.   All rights reserved.