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What is it called when the cell produces spindle fibers used to move chromosomes during mitosis and meiosis?
The process by which cells produce spindle fibers to move chromosomes during mitosis and meiosis is called "spindle formation." This occurs during the prophase stage of both processes, where microtubules assemble into a structure known as the mitotic spindle. These spindle fibers are crucial for the accurate segregation of chromosomes into daughter cells.
Does formation of spindle occur in mitiosis?
Yes, the formation of the spindle apparatus occurs during mitosis. Specifically, it takes place during the prophase stage, where microtubules organize into a spindle structure that helps segregate chromosomes into the daughter cells. The spindle fibers attach to the chromosomes at their kinetochores and facilitate their movement toward opposite poles of the cell during anaphase. This process is crucial for ensuring accurate chromosome separation and distribution.
In what stages of mitosis would you expect to find mostly polymerization taking place?
During mitosis, polymerization of microtubules primarily occurs in prophase and metaphase. In prophase, the mitotic spindle begins to form as microtubules polymerize, extending from the centrosomes. This process continues in metaphase, where the spindle fibers attach to the chromosomes at the kinetochores, facilitating their alignment at the cell's equatorial plane. Overall, these stages are characterized by significant microtubule assembly as the cell prepares for chromosome separation.
What is the site of spindle formation?
Spindle formation occurs in the centrosome, a cellular organelle that serves as the main microtubule-organizing center in animal cells. The centrosome helps to assemble and organize the microtubules that make up the spindle apparatus during cell division.
What spindle fibers disappear and the nuclear membrane reappears to form two new daughter cells?
This occurs during telophase of mitosis.
Which event occurs during prohase?
First off, just so you know, I think you mean "Which event occurs during prophase?" which is just a heads up. Answer: The spindle fibers form. Hope this helps.
In which phase do centromeres uncouple sister chromatids are separated and two new chromosomes move to opposite polls of the cell?
This occurs during the anaphase phase of mitosis. In anaphase, the microtubules shorten, pulling apart the sister chromatids at their centromeres. The separated chromatids are then pulled to opposite poles of the cell by the spindle fibers.
What structures is only present in mitosis?
The structure that is only present during mitosis is the mitotic spindle. This structure is composed of microtubules and is responsible for separating and pulling apart the sister chromatids to opposite poles of the cell. The formation of the mitotic spindle occurs during the prophase stage of mitosis and is crucial for ensuring accurate chromosome segregation. Once mitosis is complete, the spindle disassembles and is no longer present in the daughter cells.
What happens in the anaphase?
Telophase and then Cytokinesis occurs, where the cells are being split into two.
Spindle fibers disappear new nucleus forms at each end of the cell?
Yes, something like that. In mitosis, there are 4 stages; Prophase, Metaphase, Anaphase, and Telophase (also remembered as P.M.A.T). In prophase the centrioles start separate and form the spindle fibers and the chromosomes start to separate. In metaphase the chromosomes line up at the equator in the spindle fibers. Anaphase, the spindle fibre pulls half of the chromosomes to each pole, now resulting in 2 sets of identical daughter chromosomes. In telophase the spindle fibers start to disintegrate and a nuclear membrane forms between the two identical daughter chromosomes. In cytokinesis, the cytoplasm starts to separate producing two identical daughter cells. All in all, the spindle fibers do disappear and TWO (2) new identical daughter cells are formed. I hope this helps
What events occurs during telophase?
Formation of 4 haploid nuclei
Does crossing over involve centrioles?
No, crossing over does not involve centrioles. Crossing over occurs during meiosis when homologous chromosomes exchange genetic material, while centrioles are organelles involved in organizing the spindle fibers during cell division.
