Spindle

metaphase plate. DNA replication, repair spindle function, and chromosome segregation are controlled by regulatory mechanisms of spindle assembly checkpoints (Elledge, 1996). The cellular spindle apparatus includes the spindle microtubules, associated proteins, and any centrosomes or asters present at the spindle poles. The dynamic lengthening and shortening of spindle microtubules (Mitchison and Kirschner 1984) determines to a large extent the shape of the mitotic spindle and promotes the…

fixed to the pedal spindle. In the figures, Bar A is colored cyan, Bar B is magenta, and the pin in Bar B is blue. One can create more crank arms by modifying the crank arms presented here…

frequency tracking loop Has low and high frequency tracking loops Spindle loop is low frequency Spindle loop is low frequency Spindle mode is CAV (Constant Angular Velocity) Spindle mode is CLV (Constant Linear Velocity) Has circular tracks Tracks are mostly spiral, some are circular Has mostly random access applications Is used mainly in file…

1) Centrioles are a paired feature of animal mitotic spindles that protrude away from the centrisome of cells and are primarily tasked with the creation of microtubules. The microtubules give way to mitotic spindles, which play a vital role in both mitosis and cytokinesis as they give cilia and flagellum the ability to generate motion and they ensure both newly formed cells contain paired centrioles during the later stages of cell division. Kinetochores are protein structures that produce…

where meiosis begins and replicates the cell Spindle fibers start to form on the centrioles and chromosome pairs bind together making tetrads. Nuclear membrane starts to dissolve. Nuclear membrane will be drawn in dashed lines. The chromosomes will be homologous pairs with centromere in the center holding the chromosome together and there will be spindle fibers extended from the centrioles. Shows how nuclear membrane is almost dissolved and also the spindle fibers being formed. Shows…

Oedipus Quote Analysis “By fate we are driven; yield to fate. No anxious cares can change the threads of its inevitable spindle.” In this particular quote taken from the greek play Oedipus,, I feel that there is more than one type of fate. One is inevitable, in example death. Death is a fate that cannot be avoided. The second, is a type of fate that can be escaped from. For example, a robber is brought to court and sentenced to jail for 30 years. During a prison break, he escapes and sneaks on…

mitotic spindle apparatus. In animal cells, two pairs of organelles called centrioles move to opposite poles of the cells forming the fibers of the spindle apparatus between them as they move. The spindle apparatus controls the orderly separation of the duplicated chromosomes into two equal…

During the S phase of the cell cycle, the chromosomes of the cells as well as the chromatin proteins duplicate. During the M phase, spindle fibers are formed, and the duplicated chromosomes arrange themselves in the equatorial region of the cells forming a metaphase plate. Mitotic spindles are formed by the centrosome present at two poles of the cells. These spindle arrays then pull each sister chromatid to the opposite sides of the cells. After this the whole cell is divided into two by…

intrafusal muscle fibers (within the muscle spindle). When both alpha neurons and gamma neurons are present, muscle fibers with the muscle spindles are pulled parallel to the extrafusal contraction causing the muscle movement. Therefore, if they are activated within the extrafusal muscle fibers, the force developed in those areas would increase. The firing of gamma motor neurons in sync with alpha motor neurons pulls muscle spindles, innervating the muscle. The spindle is innervated by type Ia…

1. Why do you think the roots of plants are good for studying Mitosis? In my biased opinion, I believe that the roots are suitable for studying mitosis because plants always undergo mitosis. 2. Why does the root tip of the onion need to be stained? The root tips of the onion need to be stain because they provide more visibility when looking under a microscope. 3. How many phases are in the Cell Cycle? There are five stages of the cell cycle which would be Interface, Prophase, Metaphase,…