Table of Contents
- 1 What function does the spindle apparatus perform?
- 2 What is a spindle and what is its function?
- 3 What role does the spindle play in dividing the cell?
- 4 What is the function of spindles in mitosis?
- 5 When does the spindle apparatus form in a cell?
- 6 How are the microtubules of the spindle apparatus attached?
What function does the spindle apparatus perform?
The spindle apparatus is a structure of the eukaryotic cytoskeleton involved in mitosis and meiosis, often referred to as the mitotic spindle during mitosis and the meiotic spindle during meiosis. Its function is to segregate chromosomes during cell division (either mitosis or meiosis) to the daughter cells.
What is a spindle and what is its function?
Definition. Spindle fibers are microscopic protein structures that help divide genetic material during cell division and organize cellular components. The spindle fibers form out of the centrosome, also known as the microtubule-organizing center, or MTOC.
What is the function of mitotic apparatus?
a temporary structure in a dividing cell that enables the chromosomes to move to the poles of the cell, thus ensuring their even distribution between the daughter cells.
What is the spindle apparatus quizlet?
spindle apparatus refers to the subcellular structure that segregates chromosomes between daughter cells during cell division. Metaphase. the second stage of cell division, between prophase and anaphase, during which the chromosomes become attached to the spindle fibers.
What role does the spindle play in dividing the cell?
In cell biology, the spindle apparatus (or mitotic spindle) refers to the cytoskeletal structure of eukaryotic cells that forms during cell division to separate sister chromatids between daughter cells.
What is the function of spindles in mitosis?
Spindle fibers form a protein structure that divides the genetic material in a cell. The spindle is necessary to equally divide the chromosomes in a parental cell into two daughter cells during both types of nuclear division: mitosis and meiosis. During mitosis, the spindle fibers are called the mitotic spindle.
What phase does the spindle apparatus forms?
Prophase starts with condensation of chromosomes into sister chromatids. It is the most important event of prophase. Prometaphase starts abruptly with breakdown of nuclear membrane. Formation of spindle apparatus occurs during this stage.
Which structure forms the spindle apparatus during cell division quizlet?
A structure of the eukaryotic cytoskeleton involved in mitosis and meiosis. An aster contains the 2 pairs centrioles with microtubules radiating out. The centriole pairs separate and move to opposite poles to form the spindle apparatus.
When does the spindle apparatus form in a cell?
The spindle apparatus, or simply the spindle, is a network of microtubules (also called spindle fibers) that forms within a dividing eukaryotic cell, both during mitosis and meiosis (see upper image at right).
How are the microtubules of the spindle apparatus attached?
Microtubules of the spindle apparatus attach to the chromatids via complex protein structures called kinetochores, which assemble at a unique location on each chromosome called a centromere (Fig. 1, top row, panel iii.). The chromatid pairs are then pulled apart to opposite poles of the cell, which then divides (Fig. 1, top row, panel iv.).
What happens if you disrupt the spindle apparatus?
Agents that disrupt the spindle apparatus resulting in micronucleus formation from lagging chromosomes are considered to be potentially aneugenic rather than mutagenic. Distinguishing this mode of induction is important in establishing potential effects and for risk analysis.
How are cross linkers used in the spindle apparatus?
During cell division, cross-linkers help to connect the two halves of the spindle apparatus by mediating antiparallel microtubule contacts (Duellberg, Fourniol, Maurer, Roostalu, & Surrey, 2013; Glotzer, 2009).