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What are the most common phase(s) in mitosis? - Yahoo!7 Answers
http://au.answers.yahoo.com/question/index?qid=20061022213040AAoVN9m Competition: low
A number of nonkinetochore microtubules find and interact with corresponding nonkinetochore microtubules from the opposite centrosome to form the mitotic spindle. The nonkinetochore microtubules elongate, pushing the centrosomes (and the set of chromosomes to which they are attached) apart to opposite ends of the cell
Chromosomes in cells - Human Molecular Genetics - NCBI Bookshelf
http://www.ncbi.nlm.nih.gov/books/NBK7572/ Competition: low
At the early stages of development, individual cells in the embryo are totipotent: each cell retains the capacity to differentiate into all the different types of cell in the body. Other cells (often distinguished by the suffix -blast , as in osteoblasts, chondroblasts, myoblasts, etc.) divide actively and act as precursors of terminally differentiated cells
http://www.pbs.org/wgbh/nova/body/how-cells-divide.html Competition: low
Launch Interactive Printable Version Explore the stages of two types of cell division, mitosis and meiosis, and how these processes compare to one another. To make the move from asexual to sexual reproduction, nature took a system by which parent cells reproduced simply by dividing (asexual reproduction) and altered it to allow two parent cells to combine to create offspring (sexual reproduction)
What stage in mitosis does cell spend the most time in
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In metaphase, the spindle microtubules then attach to the centromeres of the chromosomes and the chromosomes then line up along the equator of the cell. They are listed in order from: Interphase Prophase Metaphase Anaphase Telophase Cytokinesis Precursor to Mitosis Before mitosis is the phase in the cell cycle called interphase
Online Biology Dictionary - C
http://www.macroevolution.net/biology-dictionary-cace.html Competition: low
cabinet of curiosities In Renaissance Europe, a private collection of remarkable or unusual objects, which were typically, but not exclusively of natural origin. cloning vector A virus, plasmid, bacteriophage, chromosome, or eukaryotic cell used to carry and replicate a DNA sequence of interest so that more copies of that DNA can be produced; also can be used for producing the protein product of a particular DNA sequence
http://textbook.s-anand.net/ncert/class-11/biology/10-cell-cycle-and-cell-division Competition: low
The interphase is divided into three further phases: G1 phase (Gap 1) S phase (Synthesis) G2 phase (Gap 2) G1 phase corresponds to the interval between mitosis and initiation of DNA replication. The beginning of diplotene is recognised by the dissolution of the synaptonemal complex and the tendency of the recombined homologous chromosomes of the bivalents to separate from each other except at the sites of crossovers
Plant Life: Mitosis and Meiosis
http://lifeofplant.blogspot.com/2011/03/mitosis-and-meiosis.html Competition: low
Mitosis produces two cells, called daughter cells, with the same number of chromosomes as the parent cell, and is used to produce new somatic (body) cells in multicellular eukaryotes or new individuals in single-celled eukaryotes. This process results in recombination (the shuffling of linked alleles, the different forms of genes, into new combinations), which results in increased variability in the off spring and the appearance of character combinations not present in either parent
Studying Mitosis in Cultured Mammalian Cells
http://cshprotocols.cshlp.org/content/2007/2/pdb.prot4674.full Competition: low
Maximize the number of cells in mitosis at the time of observation by plating the cells densely enough so they are in exponential growth at the time of the experiment. Previous SectionNext Section RELATED INFORMATION The process of mitosis is perhaps best appreciated from movie sequences illustrating the dynamic nature of the mitotic process.Movie 1 shows mitosis in pig kidney cells expressing GFP-tubulin
http://www2.estrellamountain.edu/faculty/farabee/biobk/BioBookglossC.html Competition: low
The electron transport system transfers protons from the inner compartment to the outer; as the protons flow back to the inner compartment, the energy of their movement is used to add phosphate to ADP, forming ATP. Water flows across the respiratory surface of the gill in one direction while blood flows in the other direction through the blood vessels on the other side of the surface
http://www.diffen.com/difference/Meiosis_vs_Mitosis Competition: low
Essentially any cell based organism of which all organic life is based will exhibit some form of mitosis and meiosis for growth and reproduction of the individual and species. Meiosis, on the other hand, is a division of a germ cell involving two fissions of the nucleus and giving rise to four gametes, or sex cells, each possessing half the number of chromosomes of the original cell
1.3.1 The Cell Cycle and Mitosis
http://cnx.org/content/m43135/latest/ Competition: low
Mitotic Index Figure 5 The duration of each stage of mitosis has been recorded and the data (see table below) could be used to compare the observed frequencies of the different stages as recorded by students. Add to Favorites x Add module to: My Favorites Login Required (What is My Favorites?) 'My Favorites' is a special kind of lens which you can use to bookmark modules and collections
Cytokinesis - definition from Biology-Online.org
http://www.biology-online.org/dictionary/Cytokinesis Competition: low
the cytoskelaton disassembles to make the mitotic spindle, the organelles just float around and they can float into the daughter cell right before cytokinesis occurs, but I'm curious to know how the cells make more organelles if they have too few or something. How is it that when cytokinesis takes place, the cells all stick together in a little ball? But then, later in life, some are not bound to others (red blood cells, sperm cells, etc.)
2.5 Cell Cycle and Mitosis PPT
http://www.slideshare.net/fernandasilva/25-cell-cycle-and-mitosis-ppt Competition: low
Tumors often lack sharp boundaries for easy removal, and metastatic tumors can be very small and anywhere in the body.Radiation and chemotherapy are aimed at killing actively dividing cells, but killing all dividing cells is lethal: you must make new blood cells, skin cells, etc
IUS Biology Faculty Mitosis
http://homepages.ius.edu/GKIRCHNE/Mitosis.htm Competition: low
Metaphase II: The stage at which the chromosomes line up at the equator of the cell and spindle fibers attach to the centromere of each attached sister chromatid. Sexual reproduction involves the recombination of genetic material between two different individuals of the same species to produce a genetically unique offspring
Cell Division
http://www.uic.edu/classes/bios/bios100/lecturesf04am/lect16.htm Competition: low
Regulation of the Cell Cycle The cell cycle is controlled by a cyclically operating set of reaction sequences that both trigger and coordinate key events in the cell cycle The cell-cycle control system is driven by a built-in clock that can be adjusted by external stimuli (chemical messages) Checkpoint - a critical control point in the cell cycle where stop and go-ahead signals can regulate the cell cycle Animal cells have built-in stop signals that halt the cell cycles and checkpoints until overridden by go-ahead signals. Telophase The chromosomes decondense The nuclear envelope forms Cytokinesis reaches completion, creating two daughter cells Compare Telophase to the Telophase I and to the Telophase II stages of mitosis
http://quizlet.com/8024356/the-cell-cycle-mitosis-meiosis-spermatogenesis-oogenesis-sexual-reproduction-ivf-icsi-cloning-stem-cells-early-embryology-flash-cards/ Competition: low
gap gene a homeotic gene that establishes segmentation no are centrioles present in plant cells? recombination, random alignment ate metaphase, random sperm factors allowing variation in fertilization away from the membrane in the cortical reaction, the zone moves... cyclin protein that increase and decrease, must be present from cells to move from stage to stage p53 a signaling protein that stops the g1 checkpoint and can try to repair DNA RB a protein responsible for interpreting growth signals to trigger apoptosis oogonium the stem cell for oogenesis primary oocyte present after the first mitosis of the oogonium nervous system, epidermis and derivatives, teeth coatings, lining of mouth and butt ectoderm forms..
What would happen if a cell underwent mitosis but not cytokinesis
http://wiki.answers.com/Q/What_would_happen_if_a_cell_underwent_mitosis_but_not_cytokinesis Competition: low
Answer History Related Answers: What would happen if a cell underwent mitosis but not cytokinesis? If the cell underwent mitosis without cytokinesis, the cell would have a double set of chromosomes i What would happen to cell if mitosis occurred without cytokinesis? You would end up with a cell that contained more than one nucleus
Cytokinesis - Wikipedia, the free encyclopedia
http://en.wikipedia.org/wiki/Cytokinesis Competition: low
A contractile ring, made of non-muscle myosin II and actin filaments, assembles equatorially (in the middle of the cell) at the cell cortex (adjacent to the cell membrane). In plant cells, a dividing structure known as the cell plate forms across the centre of the cytoplasm and a new cell wall forms between the two daughter cells
http://www.biology.arizona.edu/cell_bio/tutorials/cell_cycle/cells2.html Competition: low
Cdk (cyclin dependent kinase, adds phosphate to a protein), along with cyclins, are major control switches for the cell cycle, causing the cell to move from G1 to S or G2 to M
http://www.mansfield.ohio-state.edu/~sabedon/biol1110.htm Competition: low
Perhaps befitting these differences, as well as the generally increased complexity and size of eucaryotic cells relative to procaryotes, eucaryotic cell division is a much more complicated process than the relatively simple binary fission exhibited by many procaryotes. However, the key function of prophase is the development of scaffolding (spindle apparatus) necessary to move sister chromatids about the (now nucleus-less) cell
http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/M/Mitosis.html Competition: low
Anaphase begins when the anaphase promoting complex (APC) destroys securin (by tagging it for deposit in a proteasome) thus ending its inhibition of separase and allowing separase to break down cohesin. Telophase Cytokinesis Mitosis When a eukaryotic cell divides into two, each daughter or progeny cell must receive a complete set of genes (for diploid cells, this means 2 complete genomes, 2n) a pair of centrioles (in animal cells) some mitochondria and, in plant cells, chloroplasts as well some ribosomes, a portion of the endoplasmic reticulum, and perhaps other organelles There are so many mitochondria and ribosomes in the cell that each daughter cell is usually assured of getting some
http://www2.estrellamountain.edu/faculty/farabee/biobk/BioBookmito.html Competition: low
The chromosomes (which at this point consist of chromatids held together by a centromere) migrate to the equator of the spindle, where the spindles attach to the kinetochore fibers. Whereas mitosis is the division of the nucleus, cytokinesis is the splitting of the cytoplasm and allocation of the golgi, plastids and cytoplasm into each new cell
http://www.biology.arizona.edu/cell_BIO/tutorials/cell_cycle/cells3.html Competition: low
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. Cytokinesis In 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
http://biology.clc.uc.edu/courses/bio104/mitosis.htm Competition: low
Each of these cultures can be subjected to a different drug, thus enabling doctors to find the right drug sooner, while it may still be of help, and without needlessly subjecting the person to many kinds of toxic chemicals. The nuclear envelope has totally disintegrated and the polar fibers have reached the centromeres of the chromosomes and have begun interacting with them
Mitosis and cytokinesis in plants and animal cells? - Yahoo! Answers
http://answers.yahoo.com/question/index?qid=20071014213545AAlZUTG Competition: low
A contractile ring, comprised of non-muscle myosin II and actin filaments, assembles equatorially (in the middle of the cell) at the cell cortex (adjacent to the cell membrane). In plant cells, a dividing structure known as the cell plate forms across the centre of the cytoplasm and a new cell wall forms between the two daughter cells
Mitosis - Wikipedia, the free encyclopedia
http://en.wikipedia.org/wiki/Mitosis Competition: low
A new nuclear membrane, using the membrane vesicles of the parent cell's old nuclear membrane, forms around each set of separated daughter chromosomes (though the membrane does not enclose the centrosomes) The nucleoli reappear, too. A cell inherits a single centrosome at cell division, which is replicated by the cell with the help of the nucleus before a new mitosis begins, giving a pair of centrosomes
What are the most common phase(s) in mitosis? - Yahoo!7 Answers
A number of nonkinetochore microtubules find and interact with corresponding nonkinetochore microtubules from the opposite centrosome to form the mitotic spindle. The nonkinetochore microtubules elongate, pushing the centrosomes (and the set of chromosomes to which they are attached) apart to opposite ends of the cell
Chromosomes in cells - Human Molecular Genetics - NCBI Bookshelf
At the early stages of development, individual cells in the embryo are totipotent: each cell retains the capacity to differentiate into all the different types of cell in the body. Other cells (often distinguished by the suffix -blast , as in osteoblasts, chondroblasts, myoblasts, etc.) divide actively and act as precursors of terminally differentiated cells
Launch Interactive Printable Version Explore the stages of two types of cell division, mitosis and meiosis, and how these processes compare to one another. To make the move from asexual to sexual reproduction, nature took a system by which parent cells reproduced simply by dividing (asexual reproduction) and altered it to allow two parent cells to combine to create offspring (sexual reproduction)
What stage in mitosis does cell spend the most time in
In metaphase, the spindle microtubules then attach to the centromeres of the chromosomes and the chromosomes then line up along the equator of the cell. They are listed in order from: Interphase Prophase Metaphase Anaphase Telophase Cytokinesis Precursor to Mitosis Before mitosis is the phase in the cell cycle called interphase
Online Biology Dictionary - C
cabinet of curiosities In Renaissance Europe, a private collection of remarkable or unusual objects, which were typically, but not exclusively of natural origin. cloning vector A virus, plasmid, bacteriophage, chromosome, or eukaryotic cell used to carry and replicate a DNA sequence of interest so that more copies of that DNA can be produced; also can be used for producing the protein product of a particular DNA sequence
The interphase is divided into three further phases: G1 phase (Gap 1) S phase (Synthesis) G2 phase (Gap 2) G1 phase corresponds to the interval between mitosis and initiation of DNA replication. The beginning of diplotene is recognised by the dissolution of the synaptonemal complex and the tendency of the recombined homologous chromosomes of the bivalents to separate from each other except at the sites of crossovers
Plant Life: Mitosis and Meiosis
http://lifeofplant.blogspot.com/2011/03/mitosis-and-meiosis.html Competition: lowMitosis produces two cells, called daughter cells, with the same number of chromosomes as the parent cell, and is used to produce new somatic (body) cells in multicellular eukaryotes or new individuals in single-celled eukaryotes. This process results in recombination (the shuffling of linked alleles, the different forms of genes, into new combinations), which results in increased variability in the off spring and the appearance of character combinations not present in either parent
Studying Mitosis in Cultured Mammalian Cells
Maximize the number of cells in mitosis at the time of observation by plating the cells densely enough so they are in exponential growth at the time of the experiment. Previous SectionNext Section RELATED INFORMATION The process of mitosis is perhaps best appreciated from movie sequences illustrating the dynamic nature of the mitotic process.Movie 1 shows mitosis in pig kidney cells expressing GFP-tubulin
The electron transport system transfers protons from the inner compartment to the outer; as the protons flow back to the inner compartment, the energy of their movement is used to add phosphate to ADP, forming ATP. Water flows across the respiratory surface of the gill in one direction while blood flows in the other direction through the blood vessels on the other side of the surface
Essentially any cell based organism of which all organic life is based will exhibit some form of mitosis and meiosis for growth and reproduction of the individual and species. Meiosis, on the other hand, is a division of a germ cell involving two fissions of the nucleus and giving rise to four gametes, or sex cells, each possessing half the number of chromosomes of the original cell
1.3.1 The Cell Cycle and Mitosis
Mitotic Index Figure 5 The duration of each stage of mitosis has been recorded and the data (see table below) could be used to compare the observed frequencies of the different stages as recorded by students. Add to Favorites x Add module to: My Favorites Login Required (What is My Favorites?) 'My Favorites' is a special kind of lens which you can use to bookmark modules and collections
Cytokinesis - definition from Biology-Online.org
the cytoskelaton disassembles to make the mitotic spindle, the organelles just float around and they can float into the daughter cell right before cytokinesis occurs, but I'm curious to know how the cells make more organelles if they have too few or something. How is it that when cytokinesis takes place, the cells all stick together in a little ball? But then, later in life, some are not bound to others (red blood cells, sperm cells, etc.)
2.5 Cell Cycle and Mitosis PPT
Tumors often lack sharp boundaries for easy removal, and metastatic tumors can be very small and anywhere in the body.Radiation and chemotherapy are aimed at killing actively dividing cells, but killing all dividing cells is lethal: you must make new blood cells, skin cells, etc
IUS Biology Faculty Mitosis
Metaphase II: The stage at which the chromosomes line up at the equator of the cell and spindle fibers attach to the centromere of each attached sister chromatid. Sexual reproduction involves the recombination of genetic material between two different individuals of the same species to produce a genetically unique offspring
Cell Division
Regulation of the Cell Cycle The cell cycle is controlled by a cyclically operating set of reaction sequences that both trigger and coordinate key events in the cell cycle The cell-cycle control system is driven by a built-in clock that can be adjusted by external stimuli (chemical messages) Checkpoint - a critical control point in the cell cycle where stop and go-ahead signals can regulate the cell cycle Animal cells have built-in stop signals that halt the cell cycles and checkpoints until overridden by go-ahead signals. Telophase The chromosomes decondense The nuclear envelope forms Cytokinesis reaches completion, creating two daughter cells Compare Telophase to the Telophase I and to the Telophase II stages of mitosis
gap gene a homeotic gene that establishes segmentation no are centrioles present in plant cells? recombination, random alignment ate metaphase, random sperm factors allowing variation in fertilization away from the membrane in the cortical reaction, the zone moves... cyclin protein that increase and decrease, must be present from cells to move from stage to stage p53 a signaling protein that stops the g1 checkpoint and can try to repair DNA RB a protein responsible for interpreting growth signals to trigger apoptosis oogonium the stem cell for oogenesis primary oocyte present after the first mitosis of the oogonium nervous system, epidermis and derivatives, teeth coatings, lining of mouth and butt ectoderm forms..
What would happen if a cell underwent mitosis but not cytokinesis
Answer History Related Answers: What would happen if a cell underwent mitosis but not cytokinesis? If the cell underwent mitosis without cytokinesis, the cell would have a double set of chromosomes i What would happen to cell if mitosis occurred without cytokinesis? You would end up with a cell that contained more than one nucleus
Cytokinesis - Wikipedia, the free encyclopedia
A contractile ring, made of non-muscle myosin II and actin filaments, assembles equatorially (in the middle of the cell) at the cell cortex (adjacent to the cell membrane). In plant cells, a dividing structure known as the cell plate forms across the centre of the cytoplasm and a new cell wall forms between the two daughter cells
Cdk (cyclin dependent kinase, adds phosphate to a protein), along with cyclins, are major control switches for the cell cycle, causing the cell to move from G1 to S or G2 to M
Perhaps befitting these differences, as well as the generally increased complexity and size of eucaryotic cells relative to procaryotes, eucaryotic cell division is a much more complicated process than the relatively simple binary fission exhibited by many procaryotes. However, the key function of prophase is the development of scaffolding (spindle apparatus) necessary to move sister chromatids about the (now nucleus-less) cell
Anaphase begins when the anaphase promoting complex (APC) destroys securin (by tagging it for deposit in a proteasome) thus ending its inhibition of separase and allowing separase to break down cohesin. Telophase Cytokinesis Mitosis When a eukaryotic cell divides into two, each daughter or progeny cell must receive a complete set of genes (for diploid cells, this means 2 complete genomes, 2n) a pair of centrioles (in animal cells) some mitochondria and, in plant cells, chloroplasts as well some ribosomes, a portion of the endoplasmic reticulum, and perhaps other organelles There are so many mitochondria and ribosomes in the cell that each daughter cell is usually assured of getting some
The chromosomes (which at this point consist of chromatids held together by a centromere) migrate to the equator of the spindle, where the spindles attach to the kinetochore fibers. Whereas mitosis is the division of the nucleus, cytokinesis is the splitting of the cytoplasm and allocation of the golgi, plastids and cytoplasm into each new cell
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. Cytokinesis In 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
Each of these cultures can be subjected to a different drug, thus enabling doctors to find the right drug sooner, while it may still be of help, and without needlessly subjecting the person to many kinds of toxic chemicals. The nuclear envelope has totally disintegrated and the polar fibers have reached the centromeres of the chromosomes and have begun interacting with them
Mitosis and cytokinesis in plants and animal cells? - Yahoo! Answers
A contractile ring, comprised of non-muscle myosin II and actin filaments, assembles equatorially (in the middle of the cell) at the cell cortex (adjacent to the cell membrane). In plant cells, a dividing structure known as the cell plate forms across the centre of the cytoplasm and a new cell wall forms between the two daughter cells
Mitosis - Wikipedia, the free encyclopedia
A new nuclear membrane, using the membrane vesicles of the parent cell's old nuclear membrane, forms around each set of separated daughter chromosomes (though the membrane does not enclose the centrosomes) The nucleoli reappear, too. A cell inherits a single centrosome at cell division, which is replicated by the cell with the help of the nucleus before a new mitosis begins, giving a pair of centrosomes
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