Prometaphase is the phase of mitosis following prophase and preceding metaphase, in eukaryotic somatic cells. The nuclear envelope breaks into fragments and disappears.
Late prophase, or prometaphase, begins with the disruption of the nuclear envelope, which is broken down into small membrane vesicles that closely resemble the endoplasmic reticulum and tend to remain visible around the mitotic spindle.
Prometaphase
The nuclear membrane dissolves, marking the beginning of prometaphase. Proteins attach to the centromeres creating the kinetochores. Microtubules attach at the kinetochores and the chromosomes begin moving.
Metaphase ...
Prometaphase (pro-MET-uh-faze) The second of six phases of cell division, following prophase and preceding metaphase. In prometaphase, the nuclear membrane breaks apart and the spindle starts to interact with the chromosomes.
prometaphase
The phase of mitosis in which the nuclear envelope breaks into fragments.
Prometaphase
The nuclear envelope disintegrates because of the dissolution of the lamins that stabilize its inner membrane.
A protein structure, the kinetochore, appears at the centromere of each chromatid.
Prometaphase: In this stage the nuclear envelope breaks down so there is no longer a recognizable nucleus.
The mitosis is divided into four (or five) phases: prophase, prometaphase, metaphase, anaphase, telophase. Mitosis and interphase make the cell cylcle.
Related Terms:
Prophase ...
Prometaphase
Metaphase
Related Terms:
Mitosis
The most frequent process of nuclear division (karyokinesis) in cells that produces daughter cells that are genetically identical to each other and to the parent cell.
 See also: Mitosis, Metaphase, Cells, Cell, Chromosome
  
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