Animal Cell Mitosis
Chapter 9. Learn vocabulary, terms, and more with flashcards, games, and other study tools. telophase (Cytokinesis often, but not always, accompanies telophase.) This animation illustrates the events of _____. Anaphase . Which of these phases encompasses all of the stages of mitosis but no other events? Mitosis. Mitosis is nuclear division plus cytokinesis, and produces two identical daughter for mitosis (the next four phases that lead up to and include nuclear division). You can watch an animation of the process at the following link: During telophase, the chromosomes begin to uncoil and form chromatin.
In mitosis, the nuclear DNA of the cell condenses into visible chromosomes and is pulled apart by the mitotic spindle, a specialized structure made out of microtubules.
Mitosis takes place in four stages: You can learn more about these stages in the video on mitosis. In cytokinesis, the cytoplasm of the cell is split in two, making two new cells.
Phases of the cell cycle
Cytokinesis usually begins just as mitosis is ending, with a little overlap. Importantly, cytokinesis takes place differently in animal and plant cells.Mitosis
Cytokinesis in animal and plant cells. In an animal cell, a contractile ring of cytoskeletal fibers forms at the middle of the cell and contracts inward, producing an indentation called the cleavage furrow.
Phases of the cell cycle (article) | Khan Academy
Eventually, the contractile ring pinches the mother cell in two, producing two daughter cells. In a plant cell, vesicles derived from the Golgi apparatus move to the middle of the cell, where they fuse to form a structure called the cell plate.
The cell plate expands outwards and connects with the side walls of the cell, creating a new cell wall that partitions the mother cell to make two daughter cells. In animals, cell division occurs when a band of cytoskeletal fibers called the contractile ring contracts inward and pinches the cell in two, a process called contractile cytokinesis.
The indentation produced as the ring contracts inward is called the cleavage furrow. Centrioles begin moving to opposite ends of the cell and fibers extend from the centromeres.
The Cell Cycle & Mitosis Tutorial
Some fibers cross the cell to form the mitotic spindle. Prometaphase The nuclear membrane dissolves, marking the beginning of prometaphase. Proteins attach to the centromeres creating the kinetochores.
Microtubules attach at the kinetochores and the chromosomes begin moving. Metaphase Spindle fibers align the chromosomes along the middle of the cell nucleus.
Phases of mitosis
This line is referred to as the metaphase plate. This organization helps to ensure that in the next phase, when the chromosomes are separated, each new nucleus will receive one copy of each chromosome. Anaphase The paired chromosomes separate at the kinetochores and move to opposite sides of the cell. Motion results from a combination of kinetochore movement along the spindle microtubules and through the physical interaction of polar microtubules.