Q:

What are the four phases of mitosis?

A:

The four phases of mitosis are prophase, metaphase, anaphase and telophase. Each stage has its own process.

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Mitosis Overview

Mitosis is a form of cell division where one cell divides and creates two identical cells. The original cell is the called the parent cell, and the new cells are called daughter cells. The body uses mitosis for growth as our bodies mature and for repair. A cut or scrape requires mitosis of the nearest skin cells in order to heal. In general, there are four main phases in the mitosis process.

Prophase

The first stage of mitosis, prophase begins with DNA condensation. The chromosomes shorten and the nucleoli disappear. To prepare for organizing the chromosomes, the nuclear membrane breaks down as well.

Metaphase

In metaphase, the chromosomes line up in the middle of the cell by the newly formed spindle fibers. These fibers ensure that the DNA is placed in pairs so that each new cell will get one copy of each chromosome.

Anaphase

During anaphase the chromosomes separate, dividing evenly to both sides of the cell. These chromatids are now called daughter cells.

Telophase

The final stage of mitosis, the previous steps occur in reverse in telophase. The chromosomes decondense and grow longer, a new nuclear membrane forms, and nucleoli reappear. The cell division is now complete and two new cells have been formed.

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Related Questions

  • Q:

    What are mitosis and meiosis?

    A:

    Mitosis and meiosis are biological functions that create cell division and enable reproduction. These two processes are similar in that they produce offspring cells, but differ in the type of cells they produce. While mitosis results in the generation of two identical daughter cells that originate from single parent cells, meiosis involves the fission of two nuclei, which produces four gametes.

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  • Q:

    How does meiosis contribute to genetic diversity?

    A:

    During prophase I of meiosis, homologous chromosomes cross over and contribute genetic information from the mother and father cells. When this happens, the resultant haploid cell contains its own genetic information.

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  • Q:

    What are the stages of the cell cycle in order?

    A:

    The stages of the cell cycle in order are interphase, prophase, metaphase, anaphase and telophase. This process is known as mitosis and is used to generate new cells.

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  • Q:

    How does prophase I differ from prophase II?

    A:

    The major difference between prophase I and prophase II is the genetic recombination process that occurs during prophase I, but does not repeat in prophase II. During prophase I, the duplicated homologous pairs line up and cross over, which is the process by which the chromatids exchange genetic information. Because this process occurs during prophase I, it does not need to repeat during prophase II.

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