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The four stages of mitosis are known as prophase, metaphase, anaphase, telophase. Additionally, we’ll mention three other intermediary stages (interphase, prometaphase, and cytokinesis) that play a role in mitosis. During the four phases of mitosis, nuclear division occurs in order for one cell to split into two.
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- Interphase. Before a dividing cell enters mitosis, it undergoes a period of growth called interphase. About 90 percent of a cell's time in the normal cell cycle may be spent in interphase.
- Prophase. In prophase, the chromatin condenses into discrete chromosomes. The nuclear envelope breaks down and spindles form at opposite poles of the cell.
- Metaphase. In metaphase, the spindle reaches maturity and the chromosomes align at the metaphase plate (a plane that is equally distant from the two spindle poles).
- Anaphase. In anaphase, the paired chromosomes (sister chromatids) separate and begin moving to opposite ends (poles) of the cell. Spindle fibers not connected to chromatids lengthen and elongate the cell.
To begin, let’s explore the different stages of mitosis. Prophase is the first stage of mitosis. In prophase, chromosomes condense and become visible. spindle fibers emerge from the centrosomes. nuclear envelope breaks down. nucleolus disappears. Prometaphase is the second stage of mitosis. In prometaphase,
- Interphase
- Mitotic Division
- Cytokinesis
It is the preparatory growth phase of mitosis when the DNA (the genetic material) gets copied. It is the most active phase of the cell cycleinvolving a series of metabolic changes. Interphase has three stages: G1-phase: The first growth phase of the cell cycle, it is the resting stage during which some cell organellesincrease in size, and the cells...
1. Prophase
It is the first and the longest of all phases of mitosis. Prophase shows the following distinct changes within the cell: 1. The beginning is marked by the appearance of thin thread-like condensing X-shaped chromosomes. 2. Each chromosome is made of two coiled filaments called sister chromatids. 3. As the stage progresses, the sister chromatids become increasingly shorter and thicker that join together at a site called the centromere. 4. The two pairs of centrioles, formed during interphase, m...
2. Metaphase
1. It is the second phase of mitosis and is marked with the complete disappearance of the nuclear envelope that had started during prophase. 2. The chromosomes, which are at their shortest and thickest stage with two sister chromatids, get attached to the spindle fibers present at the opposite poles. 3. They then align end to end along the middle of the cell. 4. The spindle fibers then attach to each of the sister chromatids.
3. Anaphase
1. It starts by splitting each paired chromosome into two sister chromatids, now known as daughter chromosomes. 2. The daughter chromosomes are pulled towards the opposite end of the cell due to the contraction of the spindle fibers. 3. At the end of this phase, each pole contains a complete set of chromosomes.
This is the process where the cytoplasm gets divided to produce two independent daughter cells, each containing a complete set of chromosomes. Cytokinesis begins at the anaphase stage and continues through telophase and into the interphase. In the end, mitosis results in two genetically identical daughter cells, each having diploid (2n) number of c...
The cell continues to grow but also prepares for what’s to come in the next phase. M (mitosis) phase: This is the phase in which cell division occurs. Figure 08-01 shows an overview of the stages of the cell cycle. Collectively, we consider G 1, S, and G 2 to be interphase (i.e., the phases “in between” M phase).
Mitosis is the process of nuclear division, which occurs just prior to cell division, or cytokinesis. During this multistep process, cell chromosomes condense and the spindle assembles. The ...
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Sep 9, 2024 · mitosis, a process of cell duplication, or reproduction, during which one cell gives rise to two genetically identical daughter cells. Strictly applied, the term mitosis is used to describe the duplication and distribution of chromosomes, the structures that carry the genetic information. A brief treatment of mitosis follows.
