which phase of mitosis takes the longest amount of time?
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The following quote is from \n\nhttp://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&dopt=Abstract&list_uids=3607844&query_hl=6&itool=pubmed_docsum\n\n"prophase lasted 4.8 hr; metaphase, 0.2 hr; anaphase, 0.06 hr and telophase, 3.3 hr, while the interphase lasted 5.4 hr. In accordance with this, the duration of the whole mitotic process was 8.4 hr."
726289
the above answers are all correct\nCytokinesis is an eventual outcome of mitosis\nwhen mitosis or cell division happens when all the DNA and proteins are already prepared the cytoplasm divides (cytokinesis) leading to 2 new cells and cytokinesis happens in certain phases of mitosis like anaphase and telophase
858390
Firstly you should ask the proper ques. The ques. should be like this "What is the difference b/w meosis and mitosis".\n        The answer to your ques. is:-\n       MITOSIS                                       MEOSIS\n* Takes place in somatic                  * Takes place in reproductive\n   cells                                                   cells                                    \n* Produces two cells                         * Produces four haploid cells\n* No crossing over                             * Crossing Over takes place\n*The no. of chromosomes re-           * The no. of chromosomes \n  mains the same after mitosis             is reduced to one-half after\n                                                              meiosis
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At the time of cell division only the chromatid number doubles.Inter phase is the resting phase intht phase no doubling tales place .It takes place at the early meta phase stage\nIn anaphase the polar fibers or spindle fibers get attached to chromosome near the centromere.Then while they are moving towars poles,each centromere splits and carries half chromosome or one  chromatid.The chromatid in telophase becomes a full chromosome\nSo 46 chromosoes become 92 and 92become 46at the end of telophase stage.Hope you got the point.
785640
S phase in interphase
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If the total number of cells you finish with at the end of what I assume is mitosis is 36, then you began with 18 cells, which I suppose is 50%. Is that at all what you are asking?
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It is definitely the chromosomes that divide in both mitosis and meiosis. However, the whole cells divides so # 1 sounds like the right answer. Did you ask in class? I am glad you are asking here , but you really should ask your teacher.
909375
Cells that are undergoing constant mitosis such as hematopoetic stem cells (cells in your bone marrow that give rise to blood cells) and keratinocytes (skin cells) generally replicate in an ongoing manner about once a day, or faster.  I should say that it is only the skin cells of the bottom two layers of epidermis that undergo replication (stratum basale, and stratum spinosum).  Most of the replication occurs in the bottom layer of the epidermis (basale).\n\nMost of the time will be spent in the pre-mitotic cell cycle stages, G1, S, and G2, giving the cell ample time to replicate its DNA, and prepare for the division.  These stages are collectively referred to as 'interphase'.  The G1 phase varies (it will be at least 4 hours), the G2 phase lasts aroud 4-5 hours, and the S phase is usually around 6-8 hours (this is when the DNA is replicating).  So the entire interphase will be anywhere from 14-24 hours.\n\nThe mitotic process (the M phase) only takes about an hour.  Prophase is usually the longest phase of mitosis, and is in itself often broken down into a few different substages.  Once the metaphase stage begins, things move along pretty swiftly.  \n\nHope that helps!
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A typical eukaryotic cell cycle consists of several phases.1/(G1) Presynthesis gap (10hours) 2/ S-phase (DNA synthesis) 9 hours 3/ Post-synthesis gap (G2) (4 hours) and 5/ Mitosis (1 hours) (prophase-metaphase-anaphase and telophase). The whole cell cycle during cell division takes approx 24 hours but can vary between cell type and organism.
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none\n\n\nyou start with one pair of homologous chromosomes in prophase I of meiosis I.  at metaphase I, these homologues line up across the metaphase plate, and at anaphase, they seperate so that one homologue goes to one pole, and the other homologue goes to the other pole.  after cytokinesis at the end of telophase I, you have one homologue in each cell...that homologue then goes through meiosis II, and at metaphase II, that homologue lines up at the metaphase plate with each sister chromatid facing each pole, and the chromosome is "pulled apart".  Anaphase II pulls the sister chromatids to each pole, and cytokinesis splits the one cell into two....two cells, each containing one sister chromatid of a homologous pair. (although in some text books this is refered to as a single homologue)
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During prophase. But it actually doesn't happen in all organisms. Yeast for example has a nuclear duplication and division without ever breaking down the nuclear membrane.
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remember the phases in meiosis (in order) :Prophase, Metaphase, anaphase, telephase (pmat)\nMitosis\nI  INTRODUCTION \n\nMitosis, process in which a cell’s nucleus replicates and divides in preparation for division of the cell. Mitosis results in two cells that are genetically identical, a necessary condition for the normal functioning of virtually all cells. Mitosis is vital for growth; for repair and replacement of damaged or worn out cells; and for asexual reproduction, or reproduction without eggs and sperm.\n\nAll multicellular animals, plants, fungi, and protists, which begin life as single cells, carry out mitosis to develop into complex organisms containing billions of cells. Mitosis continues in full-grown organisms as a means of maintaining the organism—replacing dying skin cells, for example, or repairing damaged muscle cells. In the cells of the adult human body, mitosis occurs about 25 million times per second. Multicellular organisms such as sea stars, sea anemones, fungi, and certain plants rely on mitosis for asexual reproduction at particular stages in their life cycles, and mitosis is the sole mode of reproduction for many single-celled organisms.\n\nII  INTERPHASE \n\nThe life cycle of eukaryotic cells, or cells containing a nucleus, is a continuous process typically divided into three phases for ease of understanding: interphase, mitosis, and cytokinesis. Interphase includes three stages, referred to as G1, S and G2. In G1, a newly formed cell synthesizes materials needed for cell growth. In the S stage, deoxyribonucleic acid (DNA), the genetic material of the cell, is replicated. At this stage, DNA consists of long, thin strands called chromatin. As each strand is replicated, it is linked to its duplicate by a structure known as a centromere. When the S stage is complete, the cell enters a brief stage known as G2, when specialized enzymes correct any errors in the newly synthesized DNA, and proteins involved with the next phase, mitosis, are synthesized. \n\nIII  MITOSIS \n\nMitosis occurs in four steps. In prophase the replicated, linked DNA strands slowly wrap around proteins that in turn coil and condense into two short, thick, rodlike structures called chromatids, attached by the centromere. Two structures called centrioles, both located on one side of the nucleus, separate and move toward opposite poles of the cell. As the centrioles move apart, they begin to radiate thin, hollow, proteins called microtubules. The microtubules arrange themselves in the shape of a football, or spindle, that spans the cell, with the widest part at the center of the cell and the narrower ends at opposite poles. As the spindle forms, the nuclear membrane breaks down into tiny sacs or vesicles that are dispersed in the cytoplasm. Final disintegration of the membrane marks the beginning of metaphase. \n\nIn metaphase, the spindle fibers attach to the chromatids near the centromeres, and tug and push the chromatids so that they line up in the equatorial plane of the cell halfway between the poles. Like two individuals standing back to back at the equator, one chromatid faces one pole of the cell, and its linked partner faces the opposite pole. This precise orientation is necessary in order for the next step, anaphase, to occur. Anaphase begins when the centromeres split, separating the identical chromatids into single chromosomes, which then move along the spindle fibers to opposite poles of the cell. \n\nAs these two identical groups of single chromosomes gather at opposite poles of the cell, telophase begins. A new nuclear membrane forms around each new group of chromosomes. The spindle fibers break down and the newly formed chromosomes begin to unwind. If viewed under a light microscope, the chromosomes appear to fade away. They exist, however, in the form of chromatin, the extended, thin strands of DNA too fine to be seen except with electron microscopes. Mitosis accomplishes replication and division of the nucleus,
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no, it wont be .     Mitosis is mainly observed in the onion root tip as they r  the meristamatic tissues which have got enormous power of division so all the stages can be observed in a short period of time.\n          Mitosis will be same in all the tissues of the plant but due to slow cell cycle , observation of all the stages of mitosis will take a long time.
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Meiosis is also known as reduction division.\nIt is a type of nuclear division that gives rise to four reproductive cells (gametes) each with half the chromosome number of the parent cell. Two consecutive divisions occur. In the first, homologous chromosomes become paired and may exchange genetic material before moving away from each other into separate daughter nuclei. This is the actual reduction division because each of the two nuclei formed contains only half of the original chromosomes. The daughter nuclei then divide by mitosis and four haploid cells are produced. Four stages, prophase, metaphase, anaphase and telophase\n\nMitosis is a type of nuclear division that results in two daughter cells each having a nucleus containing the same number and kind of chromosomes as the mother cell. each chromosome divides lengthwise into two chromatids, which seperate and form the chromosomes of the resulting daughter nuclei. Four stages as well prophase, metaphase, anaphase and telophase, which merge into each other. Mitotic divisions ensure that all cells of an individual are genetically identical to each other and to the original gertilized egg.
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Both involve prophase, metaphase, anaphase and telophase. Both involve cytokinesis, and lastly DNA is replicated just before cells enter either mitosis or meiosis.
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This is simple. The interphase is a stage of the cell cycle.\nHere is the article in Wikipedia:\n"Interphase is a phase of the cell cycle, defined only by the absence of cell division. During interphase, the cell obtains nutrients, and duplicates its chromosomes. Most eukaryotic cells spend most of their time in interphase. For example, human skin cells, which divide about once a day, spend roughly 22 hours in interphase. Cells during interphase may or may not be growing. At any given time, even in an area of rapid cell division such as the tip of a plant root, 90 percent of cells are in interphase. Some cells, such as nerve cells, can stay in interphase for decades. The cell grows and replicates its DNA and centrioles. There are 3 parts of interphase: G1 (growth 1 in which the cell creates organelles and begins metabolism), S phase (DNA synthesis in which the chromosomes of the cell are copied) and G2 (growth 2 in which the cell grows in preparation for cell division). Sometimes the cells exit the cell cycles (usually from G1 phase) and enter the G0 phase. In the G0 phase, cells are alive and metabolically active, but do not divide. In this phase cells do not copy their DNA and do not prepare for cell division. Many cells in the human body, including those in heart muscle, eyes, and brain are in the G0 phase. If these cells are damaged they cannot be replaced. Interphase is the step before the mitotic phase, though it is frequently erroneously thought to be part of mitosis. The mitotic phase follows interphase, and begins with prophase.\n\nDuring interphase, the chromosomes are found arranged in the nucleus and appear as a network of long, thin threads, called the chromatin. At some point before prophase begins, the chromosomes begin to replicate themselves to form pairs of identical chromosomes. The deoxyribose nucleic acid (DNA) of the chromosomes is in use only during interphase, when the cell is in a stable and self reliant phase. In prophase the two chromatids are still connected by something called the centromere. The sister chromosomes contract tightly. Meanwhile, the nucleolus and the nuclear envelope break down and disappear, since their components have been sufficiently altered. Outside the nucleus are two centrosomes which sprout microtubules by polymerizing free-floating proteins. The centrosomes push themselves to opposite ends of the cell. The network of microtubules forms the beginning of the mitotic spindle. These spindle fibers become visible. The centrioles separate starting to radiate bundles of fibers, called asters. The spindle fibers run from one centriole to the other, at both poles of the cell. At the onset of prophase, chromatin condenses together into a highly ordered structure called a chromosome."\n---- End of citation ---\n\n\nRegarding the staining of the onion specimen - you do this in order to see the inner parts of the cell at the microscope. There are diferent types of colorations and you use one or other dependeg on what do you want to see (for example some coloration could be used for seing the chromosomes, while other coloration might be better for examining the cell wall).
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Mitosis is nuclear division plus cytokinesis, and produces two identical daughter cells during prophase, prometaphase, metaphase, anaphase, and telophase. Interphase is often included in discussions of mitosis, but interphase is technically not part of mitosis, but rather encompasses stages G1, S, and G2 of the cell cycle.  \nInterphase & mitosis Interphase \n  \nThe cell is engaged in metabolic activity and performing its prepare for mitosis (the next four phases that lead up to and include nuclear division). Chromosomes are not clearly discerned in the nucleus, although a dark spot called the nucleolus may be visible. The cell may contain a pair of centrioles (or microtubule organizing centers in plants) both of which are organizational sites for microtubules. \n \nProphase \n  \nChromatin in the nucleus begins to condense and becomes visible in the light microscope as chromosomes. The nucleolus disappears. Centrioles begin moving to opposite ends of the cell and fibers extend from the centromeres. Some fibers cross the cell to form the mitotic spindle. \n \nPrometaphase\n  \nThe 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. \n \nMetaphase\n  \nSpindle fibers align the chromosomes along the middle of the cell nucleus. This line is referred to as the metaphase plate. This organization helps to ensure that in the next phase, when the chromosomes are separated, each new nucleus will receive one copy of each chromosome.\n \nAnaphase\n  \nThe paired chromosomes separate at the kinetochores and move to opposite sides of the cell. Motion results from a combination of kinetochore movement along the spindle microtubules and through the physical interaction of polar microtubules. \n \nTelophase \n  \nChromatids arrive at opposite poles of cell, and new membranes form around the daughter nuclei. The chromosomes disperse and are no longer visible under the light microscope. The spindle fibers disperse, and cytokinesis or the partitioning of the cell may also begin during this stage. \n \nCytokinesis\n \nIn animal cells, cytokinesis results when a fiber ring composed of a protein called actin around the center of the cell contracts pinching the cell into two daughter cells, each with one nucleus. In plant cells, the rigid wall requires that a cell plate be synthesized between the two daughter cells.