Download Observing the Stages of Mitosis

Introduction: Sexual reproduction involves meiosis. Eggs and sperm will unit to form a new being.
In order to maintain the number of chromosomes the eggs and sperm must start
with half of the original quantity (ie: somatic human cells have 46 chromosomes and
sex cells have 23 chromosomes). In this activity you will compare the process of
meiosis to mitosis.
Materials:
mitosis colorgram
meiosis colorgram
poster board
2 – 25 cm yarn segments (1 of each color)
glue
colored pencils.
Procedure:
1. Split your poster board into 2 segments and label one mitosis and one meiosis.
2. Begin your diagram of the cell using colored pencils and yarn (chromosomes).
3. Each starting cell for both meiosis and mitosis should have 2 pairs of chromosomes.
4. Each stage must have a complete written description below each cell.
5. On the back, complete a double bubble map comparing meiosis and mitosis.
6. Answer the questions in the Analysis section.
Analysis:
1. What is the total number of chromosomes present in the parent cell before mitosis? _______
2. How many of each color are present before mitosis? __________
3. How many daughter cells result from mitosis? ___________
4. Is there any difference between the parent cell and the daughter cells in mitosis?
______________________________________________________________________
5. What is the total number of chromosomes present in the parent cell before meiosis? ______
6. How many of each color are present before meiosis? __________
7. How many daughter cells result from meiosis? ____________
8. List all differences between the parent cell and the daughter cells in meiosis?
______________________________________________________________________
9. How many pairs of chromosomes are in each human body (somatic) cell? ___________
10. How many pairs of chromosomes are in each human egg or sperm? (Be careful.) ___________
11. Complete the following table.
Cell Type
Number of Chromosomes
in Cell
Process used to make cell
(Mitosis or Meiosis)
Stomach
Liver
Sperm
Heart
Egg
12. Complete the following table by checking the process of the cell division in which each step
occurs.
Mitosis
Two new cells are formed from each original
Four new cells are formed from each original
Replication of chromosomes occurs
Doubled chromosomes pair to form tetrads
Cells with a reduced chromosome number are formed
Cells with the same chromosome numbers as original
are formed
Results in forming egg or sperm cells
Results in forming somatic or body cells
Each original cell divides only once
Each original cell divides twice
Tetrads are not formed
Chromosomes move to the cell’s center
Meiosis