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Chromatin in the nucleus condenses to form chromosomes. The pairs of centrioles move to opposite sides of the nulceus. Spindle fibers form a bridge between the ends of the cell. the Nuclear envelope breaks down.

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What stage of mitosis does the nucleolus disappears?

The nucleolus disappears during the prophase stage of mitosis when the nuclear envelope breaks down, chromosomes condense, and the spindle apparatus begins to form. This is in preparation for the separation of genetic material into two daughter cells.


What stage mitosis is it when chromosomes shorten and thicken and the nuclear membrane begins to disappear?

The stage of mitosis where chromosomes shorten and thicken and the nuclear membrane begins to disappear is prophase. During prophase, the chromatin condenses into distinct chromosomes and the nuclear envelope breaks down, allowing the chromosomes to interact with the spindle fibers.


When does crossing over take place between homologous chromosomes during meiosis?

Crossing over between homologous chromosomes occurs during prophase I of meiosis.


What stage of mitosis do the centrioles move to opposite ends of the cell?

The centrioles move to opposite ends of the cell during the prophase stage of mitosis. This movement is essential for the formation of the mitotic spindle, which helps separate the duplicated chromosomes during cell division.


How does prophase you differ from prophase II?

At the beginning of telophase I, each half of the cell has a complete haploid set of chromosomes, but each chromosome is still composed of two sister chromatids. Cytokinesis usually occurs simultaneously with telophase I, forming two haploid daughter cells. No chromosome replication occurs between the end of meiosis I and the beginning of meiosis II, as the chromosomes are already replicated. In telophase II, the nuclei form and the chromosomes begin decondensing. The meiotic division of one parent cell produces four daughter cells, each with a haploid set of (unreplicated) chromosomes.

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The process of Meosis I i.e. a mitotic division in meosis which do not take place in bacteria is longer and in that mitotic division prophase is the longest part and is even longer then bacterial prophase


The events of prophase seem to be opposite of those that occur during what phase?

The events of prophase in mitosis, such as condensation of chromosomes and breakdown of the nuclear envelope, are opposite to those that occur during telophase, where chromosomes decondense, and the nuclear envelope reforms.


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The nucleolus disappears during the prophase stage of mitosis when the nuclear envelope breaks down, chromosomes condense, and the spindle apparatus begins to form. This is in preparation for the separation of genetic material into two daughter cells.


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During telophase, the events that occur are essentially the reverse of those in prophase. The chromosomes, which condensed and became visible during prophase, de-condense back into chromatin. The nuclear envelope reforms around each set of separated chromosomes, restoring the nucleus. Additionally, the spindle fibers disassemble, contrasting with their formation during prophase.


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