Lab 8, Mitosis and Meiosis
Julie Lake
November 8, 2012
BIO 111, C11- Online
Villalpando, Shawn
Lab 8
Title: Mitosis and Meiosis
Exercise 1: Mitosis in Animal and Plant Cells
Questions:
A.) What is the purpose of mitosis?
The purpose of mitosis is to create or produce more cells for a living organism. Mitosis occurs when genetic substance in the nucleus divides or separates in order to create more cells. Cytokinesis normally occurs next and the single cell develops into two separate cells. This same process continues to occur over and over creating more cells for an organism replacing old or dead cells.
B.) What other term is commonly used in place of “mitosis”?
Another commonly used term for “mitosis” is “cell division”, because the division of cells is what occurs during the process of mitosis.
C.) What is blastula?
Blastula is the end of the cleavage furrow stage in the cell division process when there is a collection or ball of cells.
D.) What are the differences in the mitotic processes between animal and plant cells?
The difference between the mitotic processes of animal and plant cells are that animal cells have a cleavage furrow at the end of the telophase and cytokinesis phases and plant cells have a cell plate.
E.) Why might there be more mitotic division in an onion root tip than in other areas of the plant?
There is usually more mitotic division in an onion root tip than in other areas of the plant because the tip of the plant is where the new growth is occurring and cells are dividing and creating more cells.
F.) A summary of mitosis – fill in the correct answer. The nucleus in the undivided cell has the diploid (2n) number of chromosomes, and the nuclei in the two split cells also have __the same___ number of chromosomes. In mitosis, the chromosome number (check the correct choice) __X___ stays the same or _____ halves.
Results:
For both the whitefish and the onion, what is the 2n number of chromosomes that were observed? HINT: separate chromosomes are
November 8, 2012
BIO 111, C11- Online
Villalpando, Shawn
Lab 8
Title: Mitosis and Meiosis
Exercise 1: Mitosis in Animal and Plant Cells
Questions:
A.) What is the purpose of mitosis?
The purpose of mitosis is to create or produce more cells for a living organism. Mitosis occurs when genetic substance in the nucleus divides or separates in order to create more cells. Cytokinesis normally occurs next and the single cell develops into two separate cells. This same process continues to occur over and over creating more cells for an organism replacing old or dead cells.
B.) What other term is commonly used in place of “mitosis”?
Another commonly used term for “mitosis” is “cell division”, because the division of cells is what occurs during the process of mitosis.
C.) What is blastula?
Blastula is the end of the cleavage furrow stage in the cell division process when there is a collection or ball of cells.
D.) What are the differences in the mitotic processes between animal and plant cells?
The difference between the mitotic processes of animal and plant cells are that animal cells have a cleavage furrow at the end of the telophase and cytokinesis phases and plant cells have a cell plate.
E.) Why might there be more mitotic division in an onion root tip than in other areas of the plant?
There is usually more mitotic division in an onion root tip than in other areas of the plant because the tip of the plant is where the new growth is occurring and cells are dividing and creating more cells.
F.) A summary of mitosis – fill in the correct answer. The nucleus in the undivided cell has the diploid (2n) number of chromosomes, and the nuclei in the two split cells also have __the same___ number of chromosomes. In mitosis, the chromosome number (check the correct choice) __X___ stays the same or _____ halves.
Results:
For both the whitefish and the onion, what is the 2n number of chromosomes that were observed? HINT: separate chromosomes are
Cited: Vorndam, Margaret E. “General Biology Independent Laboratory Experiences for the College Science Major: First Semester”. Hands-on-Labs, Inc., Sheridan, Colorado. 2012. Print.