Lab: Mitosis Cookies - notes PDF

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Lab: Mitosis Cookies Background: Mitosis is a type of cell division that results in forming two daughter cell that are identical to the parent cell with same number and types of chromosomes. The main purpose is to grow and replace the damaged cells. Introduction: The objective of the lab is to differentiate the stages of mitosis using sandwich cookies and sprinkles to identify the various stages of cell division. Materials: 8 Sandwich cookies (animal cells) Paper Towel Sprinkles (chromosomes) 12 of each of 3 colors (36 total) Procedure: 1) Wash your hands and desk. 2) Get 8 sandwich cookies and place on paper towel. 3) Twist the cookies apart so you have sides with icing on them. You will need to use 4) Get 36 assorted colored sprinkles (3 colors, 12 of each color), these will be used to represent the chromosome pairs. 5) Using the icing end as a background, illustrate the phases of mitosis and Interphase. Place the pairs of sprinkles on the icing, as you think the chromosome pairs would look at each stage. a) Make sure to include; Centrioles, spindle fibers, 3 chromosomes 6) Sketch the phases of mitosis in the data section before you start in order to avoid confusion and delays. 7) When you have completed this investigation, have your teacher check your mitosis cookies for accuracy and be prepared to explain each stage of mitosis. 8) Once you have explained your mitosis cookies, feel free to dispose of cookies as you will. (Yes, you may eat them.) 9) Complete the conclusion questions.

Data: Sketch the phases of mitosis and give a brief description of each stage.

Analysis & Conclusion: 1) What are chromosomes? A DNA molecule with all of the genetic material of an organism. Chromosome is consists of packages of tightly-condensed DNA. 1) In what phase does doubling of the chromosomes take place? Doubling takes place during S-phase of the interphase cycle where each of the chromosomes get duplicated by the cell. 1) In what type of cells does mitosis take place? Mitosis takes place only in Eukaryotic cell which has a nucleus and membrane bound Organelles. 1) In what phase does the membrane around the nucleus dissolve? During the Pro-metaphase the nuclear membrane dissolves. 1) In what phase do the chromosomes line up along the equator of the cell? In the Metaphase the Chromosomes line up along the equator of the cell. 1) In which phase of mitosis do sister chromatids split apart and move toward the poles of the cell? During the anaphase sister chromatids separate and moves towards opposite poles of the cell. 1) During which phase of mitosis does the nuclear membrane reappear around the newly formed sets of chromosomes? During the Telophase nuclear membrane begin to form. 1)

When do the chromosomes replicate? Hint: Before mitosis begins

In the S-phase of the interphase DNA replication takes place. 1)

From what structures do the spindles originate?

Spindles originate from Microtubules that originates from centrioles. 1)

What are the spindles made of?

Spindles made of as many as 45 different proteins that grow from the centrioles. 1)

What is cytokinesis?

Cytokinesis is the las sage of the cell cycles and the division of the cytoplasm. 1) What is the difference between cytokinesis in plant and animal cells? In plant cell new cell wall is formed between the new daughter cells meanwhile in animal cells the cell membrane pinch the parent cell into two daughter cell. 1) What is the end result of Mitosis? The end result of mitosis is cell divides into two identical daughter cells. 1) What errors were executed during this activity? Some errors were: •

Placing the phases in different order

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Not adding the Spindle fibers

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differentiate the phases that have nucleus

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Not putting the chromosomes in the right place

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Not connecting the chromosomes during pro and meta phase....