What is a spindle and its function?
Spindle fibers are part of a spindle apparatus that moves chromosomes during mitosis and meiosis to ensure even chromosome distribution between daughter cells. The spindle apparatus of a cell is comprised of spindle fibers, motor proteins, chromosomes, and, in some animal cells, microtubule arrays called asters.
Where is the spindle in a cell?
centrioles
Spindle fibers are protein structures that form early in mitosis, or cell division. They consist of microtubules that originate from the centrioles, two wheel-shaped bodies located in the centromere area of the cell. The centromere is also known as the microtubule organizing center.
What phase does the spindle form?
The mitotic spindle also begins to develop during prophase. As the cell’s two centrosomes move toward opposite poles, microtubules gradually assemble between them, forming the network that will later pull the duplicated chromosomes apart.
What is a spindle what is its function quizlet?
Spindle. Definition: Fan-like structure made of microtubules that helps separate the chromosomes during mitosis.
Is involved in spindle formation during cell division?
The structure involved in the formation of spindle fibres are centrioles.
What are centrosomes?
A centrosome is a cellular structure involved in the process of cell division. Before cell division, the centrosome duplicates and then, as division begins, the two centrosomes move to opposite ends of the cell.
What does a spindle look like in a cell?
Collectively, they form a spindle-shaped structure, which is widest at the middle then tapers at both ends. The spindle fibers form during prophase. During metaphase of cell division, the spindle fibers radiate from the centrioles at the opposite poles.
What is the spindle in mitosis quizlet?
An assemblage of microtubules and associated proteins that is involved in the movements of chromosomes during mitosis.
What does the spindle do during mitosis quizlet?
The mitotic spindle begins to form. The spindle is a structure made of microtubules, strong fibers that are part of the cell’s “skeleton.” Its job is to organize the chromosomes and move them around during mitosis. In prophase, the spindle grows between the centrosomes as they move apart.
What do the centrosomes do?
The centrosome is the primary microtubule-organizing centre (MTOC) in animal cells, and so it regulates cell motility, adhesion and polarity in interphase, and facilitates the organization of the spindle poles during mitosis.
What is centriole and centrosome?
A centriole is a barrel-shaped organelle which lives normally within the centrosome. The centrosome is the area of the cytoplasm. It’s next to the nucleus and within the centrosome. The word some refers generally to an organelle of some sort, like a lysosome or an endosome.