Mitosis
In this worksheet, you will review the steps of mitosis. You will also view an onion root tip and
calculate the percentage of cells at each of the stages of cell division.
Stages of Mitosis
Answer the following questions:
1. Which stage does each of the following occur?
•
Chromatin condenses into chromosomes
Prophase
_____________________________________
•
Chromosomes align in center of cell.
Metapahse
_____________________________________
•
Longest part of the cell cycle.
_____________________________________
Interphase
•
Nuclear envelope breaks down.
•
_____________________________________
Prophase
Cytokinesis
Cell is cleaved into two new daughter cells. _____________________________________
•
Daughter chromosomes arrive at the poles. _____________________________________
Telophase
•
Chromatids are pulled apart
_____________________________________
Anaphase
2. Answer the following questions. You can review the steps of mitosis using the following
online activity https://www.oppia.org/explore/q4NBr1JG7Qrt:
•
46 chromosomes
How many chromosomes are visible at the beginning of mitosis? ____________
•
How many are in each daughter cell at the end of mitosis?
•
The little orange T shaped things on the cell are:
____________
23 chromosomes pairs
__________________________
Centrioles
• What happens to the centrioles during mitosis?
____________________________
Centrioles use spindle fibers to connect to the chromosomes and pull them apart, allowing cytokinesis to occur.
3. Identify the stages of these cells:
Metaphase
_________________________________
_________________________________
Telophase
Interphase
_________________________________
Mitosis Internet Lesson. Provided by: Biologycorner.com. License: CC BY-NC: Attribution-Noncommercial
Located at: https://www.biologycorner.com//worksheets/mitosis.html
4. Draw a cell in each of the following phases. Be sure to represent the major events of each
phase and label structures.
Prophase
Prometaphase
Metaphase
Anaphase
Telophase
Mitosis Internet Lesson. Provided by: Biologycorner.com. License: CC BY-NC: Attribution-Noncommercial
Located at: https://www.biologycorner.com//worksheets/mitosis.html
Onion Root Tip
Online Activity at http://www.biology.arizona.edu/cell_bio/activities/cell_cycle/cell_cycle.html
Read the introduction, then click the “next” button.
You will have 36 cells to classify. When you’re finished, record your data in the chart below.
Round to whole numbers.
Interphase
Prophase
Metaphase
Anaphase
Telophase
Total
Number of Cells
Percent of Cells
(calculate: number of cells
divided by total cells x 100)
Mitosis in Whitefish & Onion Roots
http://www.biologycorner.com/projects/mitosis.html. Click on the Whitefish embryo and the
onion root tip.
For each organism, identify the stage of mitosis.
View 1
View 2
View 3
View 4
Whitefish
Anaphase
Metaphase Interphase Telophase
Onion
Anaphase
Metaphase Interphase Telophase
View 5
Cytokinesis
Mitosis Internet Lesson. Provided by: Biologycorner.com. License: CC BY-NC: Attribution-Noncommercial
Located at: https://www.biologycorner.com//worksheets/mitosis.html