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Spindle in Biological Definition

Anaphase

... poles of the cell (opposite ends of the nuclear spindle ). Anaphase is preceded by metaphase , by the ... along a surface known as the metaphase plate. spindle fibres (microtubules containing γ-tubulin) extend from the spindle poles to the centromeres . The point of contact ...

Meiosis

... and nuclear envelope and the formation of the spindle fibres (including their attachment to ... envelope has already dispersed into vesicles. spindle fibres ( microtubules ) attach only to one ... I includes the disappearance of spindles and spindle fibres as well as the uncoiling of the chromatids ...

Mitosis

... spindles . By increasing the length of the spindle (growing the microtubules), the centrioles push ... chromosome - one for each chromatid. When the spindle grows to sufficient length, the microtubules ... process by generating a signal - the mitotic spindle checkpoint - that tells the cell to wait before ...

Mitotic spindle

... The mitotic spindle is a structure of the eukaryotic cytoskeleton ... resembling an American football in shape. The spindle is aligned perpendicularly to the plane along which the cell is to divide. In most cells, the spindle is formed by the centrosomes as they move ....

Mitosis

... spindles . By increasing the length of the spindle (growing the microtubules), the centrioles push ... chromosome - one for each chromatid. When the spindle grows to sufficient length, the microtubules ... process by generating a signal - the mitotic spindle checkpoint - that tells the cell to wait before ...

Centromere

... where the kinetochore is assembled. Thus, it is the site where spindle fibers of the mitotic spindle attach to the chromosome during mitosis . It is also the site of the ...

Centrosome

... migrate to opposite poles of the cell. Between them is formed the spindle , a bundle of microtubules that will function later as the foundation ... spindle. When the centrioles are destroyed, for example by a laser , the spindle nonetheless forms and cell division procedes normally. ...

Eukaryote

... bundles called chromosomes , which are separated by a microtubular spindle during nuclear division. In addition to asexual cell division, most ... derived from it. Centrioles may also be associated in the formation of a spindle during nuclear division. Some protists have various other ...

Prophase

... may be thought of as cellular ropes or poles) and forming a mitotic spindle between them. By increasing the length of the spindle (growing the microtubules), the centrioles push apart to opposite ends of ...

Centriole

... they are located in (close to the nucleus) is known as the centrosome . Centrioles are important in the cell division process, organizing the spindle upon which the chromosomes are pulled apart. Some animal cells may be able to separate without centrioles. Centrioles assist the cell through the ...

Chromatid

... mitosis or meiosis . Each chromosome consists of two exactly identical (" sister ") chromatids. After they have been pulled apart by the mitotic spindle , chromatids are called "chromosomes". Sister chromatids are joined at a point called the centromere . In non-gametic, non-dividing human cells, ...

Cytoskeleton

... dyneins and kinesins they transport organelles like mitochondria or vesicles .) the axoneme of cilia and flagella the mitotic spindle synthesis of the cell wall in plants. The prokaryotic cytoskeleton The cytoskeleton was previously considered to be a feature only of ...

Tubulin

... evolutionarily related to tubulin. Delta and epsilon tubulin have been found to localize at centrioles and may play a role in forming the mitotic spindle during mitosis. Pharmacology Tubulins are targets for anticancer drugs like taxol . The anti- gout agent colchicine binds to tubulin ...

Virus classification

... are smaller than viruses but have some of their properties. Viroids Family Pospiviroidae Genus Pospiviroid ; type species: Potato spindle tuber viroid Genus Hostuviroid ; type species: Hop stunt viroid Genus Cocadviroid ; type species: Coconut cadang-cadang viroid ...
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