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Oreo Cookie Mitosis Lab (edited)
547
Cytokinesis
Oreo Cookie Mitosis Lab
Edited by:
K Monroe
Adapted from: Jose Gonzalez-Herrera
May 2016
Metaphase
The cytoplasm & its organelles divide equally into 2 "daughter" cells.
The chromosomes move to line up across the center and spindle fibers attach to the center of each chromosome.
Metaphase is the second stage of Mitosis. In Metaphase, the chromosomes move toward the center of the cell. Centrioles aid in the formation of spindle fibers. These microtubules of protein attach to the centromere of each chromosome.
Technically not a phase of mitosis! The shortest and final stage of the cell cycle. Each daughter cell has its own nucleus, cytoplasm, organelles, etc. Each daughter cell now begins their own cycle - starting with Interphase!
Anaphase
The centromeres split and the sister chromatids are pulled apart to opposite sides of the cell.
The third phase of Mitosis is Anaphase. In Anaphase, The sister chromatids are split apart by the spindle fibers and pulled towards the centrioles at opposite sides of the cell. Each pole then contains an identical set of chromosomes.
Prophase
Telophase
The chromatin coils to form visible chromosomes. What would the star shaped structures be?
Two distinct nuclei are formed. Each has its own copy of the genetic material.
Prophase is the first and longest stage of Mitosis. The cell's DNA coils into visible chromosomes and the nuclear membrane dissapears. The two halves of the chromosome are called "sister" chromatids (their hereditary information are identical). The two sister chromatids are attached by their middles, known as the centromere.
Introduction
The process of Mitosis will be illustrated through the cookies with cream filling.
Telophase is the fourth stage of Mitosis. In Telophase, nuclear membranes form around each cluster of chromosomes forming 2 separate, but identical nuclei!
Materials
6 Oreo cookies, various color/size sprinkles,
toothpicks, and paper towels.
Procedure
The top of the cookie will be twisted off to get six sides with cream. The cream will represent the cytoplasm and the sprinkles will represent the organelles needed for mitosis.
Note: Interphase is the 1st stage of the cell cycle but is not pictured in this lab for simplicity.