prophase what structure breaks down
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What happens in prophase? The late prophase is one of the stages in mitosis and during this  stage there is a break up of the nuclear envelope and the  microtubules that the spindle fibers are made u…p of called the  polar fibers reach from the pole to the equator of each cell.
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"What Is the Definition of ""meiosis 2""?" Meiosis II is a process that includes prophase II, metaphase II, anaphase II, telophase II and cytokinesis. In prophase II, spindle fibers form inside the cells. Next, chromosomes align along the metaphase plate during metaphase II. In anaphase II, the chromosomes divide at their centromeres and migrate to each pole of the cell. During telophase II and cytokinesis, the chromosomes form four haploid nuclei, and the cells break apart to form four haploid cells. Learn more about Molecular Biology & DNA Sources:
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An Introduction to DNA and Chromosomes (Text and Audio) During this stage, the microtubules, or spindle fibers, pull the homologous chromosomes apart and move them to opposite ends of the cell. Telophase I is next. Here the spindle fibers are broken up, new nuclear membranes form, the chromosomes uncoil, and the cell divides into two daughter cells. The next phase of meiosis is called Meiosis II. This begins with prophase II. During this stage the chromosomes condense once again, the nuclear membrane breaks down, and the spindle apparatus forms in each of the two new cells. This is followed by metaphase II. Here the spindle fibers attach to the chromosomes and again align them at the middle of the new cells. Next, during anaphase II, the sister chromatids are pulled to opposite ends of the cells, and the cells elongate.
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What 3 things happen during Prophase of Mitosis? Nuclear membrane disintegrates Chromosomes condense Spindle apparatus begins to form between poles Nucleoulus disappears. I guess pick three from that. :) Prophase 1: - pairing of homologous chromosomes occur, each chromosome consist of two chromatides -crossing over produces exchange of genetic information. -the nuclear envelope breaks down. - spindles form. Prophase 2: -chromosomes condense. -spindles form in each new cell. -spindle fibers attach to chromosomes.
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Chapter 8 DNA & RNA and Chapter 9 Cell Division Prophase. the thin tangled chromatin coils and thickens, becomes visible as separate chromosomes each with two sister chromatids, nuclear membrane dissolves, nucleolus disappears, centrioles move to opposite ends (poles) of cell, spindle fibers begin to form from pole to pole.
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Mitosis/ Meiosis Prophase 2 - chromosomes condense; nuclear envelopes disappear. Metaphase 2- chromosomes line up in the middle. Anaphase 2- sister chromatids are pulled away from each other. Telophase 2- chromatids move to the poles, nuclear envelope forms. the end result is 4 nonidentical haploid cells.
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- 1 Learning the Stages of Mitosis: Prophase In the sequence of mitosis, prophase is the step in which the chromatin transfers into chromosomes, which are dual rod-like structures. 2  This is the first step in the cellular….
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- Prophase I. Mechanism: All cells undergoing a meiotic division pass through two distinct periods called First division, in which the homologous chromosomes are separated, and the Second division, in which the duplicated DNA molecules are separated. Prophase I This is the most complex of the various stages of meiosis.
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Prophase Fluorescence microscope image of two mouse cell nuclei in prophase (scale bar is 5 µm). Prophase (from the Greek πρό, before and φάσις, stage), is a stage of Mitosis. This is when the chromatin condenses into two rod-shaped structures called chromosomes in which the chromatin becomes visible. This process, known as chromatin condensation, is involved with the condensin complex.
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Introduction Some textbooks list five, breaking prophase into an early phase (called prophase) and a late phase (called prometaphase). These phases occur in strict sequential order, and cytokinesis - the process of dividing the cell contents to make two new cells - starts in anaphase or telophase.
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What step of mitosis condenses the chromatin into discrete chromosomes the nuclear envelope breaks down and spindles form at opposite poles of the cell? In prophase stage, the replicated chromosomes condense and the  nuclear envelope disappears. Earlier in prophase, chromatin visible  condenses into the chromosomes.
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During mitosis what happens in prophase? In summery chromatin condenses into chromosomes; centrioles move toward opposite poles of the cell. Prophase: During this first mitotic stage, the nucleolus fades and chromatin (replicated DNA and associated proteins) condenses into chromosomes. Each replicated chromosome comprises two chromatids, both with the same genetic information.
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Section 1006 topic meiosis 48 sexual reproduction Identify which event will occur during Prophase I of meiosis but does not occur during prophase of mitosis. A. bivalents will form B. nuclear envelope will dissolve C. centrioles will form in animal cells D. chromatin will condense into chromosomes Bloom's Level: 2. Understand Learning Outcome: 10.04.02 Distinguish the events that occur during prophase I of meiosis that do not occur during prophase of mitosis.
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Mitosis What Happens during Prophase? Prophase is the first stage in mitosis, occurring after the conclusion of the G2 portion of interphase. During prophase, the parent cell chromosomes — which were duplicated during S phase — condense and become thousands of times more compact than they were during interphase.
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MADMAN BIOLOGY During prophase I of meiosis, the loose, shapeless chromatin binds tightly, winding itself up around histones (proteins embedded in the DNA for structure) to form chromosomes.
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High School Biology : Understanding Stages of Mitosis There are five main steps of mitosis. 1  Prophase: the nuclear envelope breaks down, chromosomes condense, and spindle fibers connect to sister chromatids. 2  Metaphase: spindle fibers pull sister chromatids to the metaphase plate at the equator of the cell. 3  Anaphase: spindle fibers separate sister chromatids to opposite poles of the cell.
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High School Biology : Understanding Stages of Mitosis Mitosis has four sequential stages: prophase, metaphase, anaphase, and telophase. In prophase, each chromosome becomes condensed and more visible, and there is the breakdown of the nuclear membrane and appearance of spindle fibers. In the next phase, metaphase, the chromosomes line up along the metaphase plate.
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- It's generally agreed upon that chromosomes become visible during prophase of the cell cycle. Some scientists will say prometaphase (sort of a bridge between prophase and meta…phase). Mitosis would occur after telophase of the cell cycle (Prophase, Metephase, Anaohase, Telophase). TheQuizer.
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What Moves the Chromatids During Mitosis? The first phase of mitosis is called prophase, during which the DNA that has been replicated condenses into an X-shaped body. The next phase is called prometaphase; during this stage, the nuclear membrane breaks down into vesicles, which allows microtubules to invade the nuclear space of the cell.
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Spindle apparatus occurs during which phase of mitosis? A) Prophase B) Metaphase C) Anaphase D) Telophase All four! The spindle apparatus forms in Prophase, does its main job in Metaphase and Anaphase, then breaks down again during Telophase. The spindle apparatus is of utmost importance in the process of mitosis, as it is responsible for ensuring that the chromosomes are divided equally among the two daughter cells. It begins to form during Prophase, and binds to the centromeres of each chromosome.
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Concept 8 Review Concept 8 Review. Cytokinesis in Plant Cells. Plant cells have walls, so cytokinesis cannot proceed with a cleavage furrow. Instead, during telophase a cell plate forms across the cell in the location of the old metaphase plate. During telophase, membrane-enclosed vesicles derived from the Golgi apparatus migrate to the center of the cell where the metaphase plate used to be and fuse to form a cell plate.
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prophase pro·phase. The first stage of cell division. Before prophase begins, the chromosomes duplicate to form two long, thin strands called chromatids. During prophase itself, the chromatids condense and thicken and the membrane surrounding the nucleus disappears. In mitosis, prophase is followed by metaphase.
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- At the end of prophase, the tiny nucleolus within the nucleus dissolves. The nucleolus starts moving towards the nuclear membrane at the beginning of prophase, and its disintegration occurs near the nuclear envelope. Its contents are dispersed in masses. Basically, the chromatin in the nucleus coils into chromosomes.
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Difference Between Prophase I and Prophase II Prophase I. Prophase I is found in Meiosis I. The chromosomes become visible in Prophase I and synapse to form tetrads. Resulting tetrads contain two pairs of chromosomes; therefore, known as “bivalents”. Crossing over is an important process happens in Prophase I which allows the chromosomes to exchange genetic materials and to produce more different recombinants. The crossing over points in chromosomes are called “Chiasmata”.
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What is the phase where nuclear envelope dissolves? Prophase is the next phase and it is where centrosomes move towards the poles (either end) of the cell. They start producing spindle fibres. The nuclear membrane breaks down, which will allow the chromosomes to move towards the poles during anaphase.
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MADMAN BIOLOGY 1 Creates all body cells (somatic) apart from the germ cells (eggs and sperm). 2  Prophase is much shorter. 3  No recombination/crossing over occurs in prophase. 4  In metaphase individual chromosomes (pairs of chromatids) line up along the equator.