Micro-Viewer Lab: Animal Mitosis
NAME:__________________________
Introduction: Throughout this lab we will be examining an animal cell that is under-going mitosis. Read
and follow the directions for the use of the Micro-Slide-Viewer and the Microslide on the envelope
attached to the text folder and holding the slides. Examine each slide and study the description in the
text folder. After studying each slide and the printed text, answer the question for that slide on this
worksheet. If you don’t know the answer, go on to the next slide and question. You may find the answer
as you learn more about the subject. Draw and label what you see in the space provided.
Introduction
1a. The process of cell development described in this set is called __________________________.
1b. The specimen studied is the egg sac of the ascaris worm. Why?
Slide 1 – The Zygote.
2a. This slide shows the zygote (the fertilized egg) of the ascaris. How many masses of chromatin can
you see in the cell? _______________________________
2b. Where did these masses come from? ________________________________________________
2c. The amount of hereditary material supplied by each parent of the ascaris is equal/not equal.
(Circle your choice)
Slide 2 – Pre-Metaphase
3a. Draw what you see on this slide in the circle to the right.
3b. How many chromosomes can you see? _______________
3c. Each parent supplied _____________ chromosomes to form the zygote.
Slide 3 – Metaphase
4a. Draw what you see on this slide in the circle below. Explain how you know, by looking at the picture,
this is metaphase.
4b. Make sure to draw the equatorial plate (blue); a centriole(green); spindle fibers (red)
Slide 4 – Metaphase – Polar View
5a. How does this picture differ from the one you drew in for slide 3?
5b. In this slide the chromosomes are seen as they lie flat on the _________________________ plane.
Slide 5 – Early Anaphase
6a. How many chromosomes are shown on this slide?_______________
6b. The number of chromosomes on this slide contain enough hereditary material for __________cells.
Slide 6 – Anaphase
7a. The chromosomes in this slide have separated to form _______ groups. Each group contains
____________ chromosomes.
7b. Why do some of the chromosomes appear to be beaded in places?
Slide 7 – Telophase
8a. Draw what you see on this slide in the circle to the right.
8b. The two groups of chromosomes are still connected/completely apart.
(Circle your choice)
8c. What is happening to the cell membrane?
Slide 8 – Late Telophase
9a. How many cells are seen on this slide?_________
9b. How do these cells compare with the cell in slide 1?
9c. How many chromosomes are involved in human mitosis? __________
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