Unit 3 cell division
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The cell cycle consists of interphase, mitosis, and cytokinesis. During interphase, the cell grows and DNA is replicated. Mitosis involves the separation of chromosomes into two identical sets. Cytokinesis then divides the cell cytoplasm, resulting in two daughter cells that each have the full complement of chromosomes. The cell cycle allows for organism growth, tissue repair, replacement of dead cells, and reproduction in some simple organisms.
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![The cell cycle includes the following phases:
Interphase (include G1- , S- [DNA synthesis]
and G2 phase)
Mitosis
Cytokinesis
Growth
The result is 2 identical cells.](https://image.slidesharecdn.com/unit3celldivision-121108164223-phpapp02/85/Unit-3-cell-division-2-320.jpg)
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This document summarizes the two main types of cell division: mitosis and meiosis. Mitosis is the process where a somatic cell duplicates its DNA and divides into two identical daughter cells. The key phases of mitosis are interphase, prophase, metaphase, anaphase, telophase, and cytokinesis. Meiosis involves the creation of sex cells and results in four haploid cells from one original cell.Bft1033 1 mitosis_print1
Bft1033 1 mitosis_print1Rione Drevale
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Cell division occurs through mitosis to allow for growth, development, and repair of organisms. Mitosis involves several stages - prophase, metaphase, anaphase, and telophase - where duplicated chromosomes are aligned and separated, with one set moving to each new daughter cell. Cytokinesis then fully divides the cytoplasm, completing cell division and producing two identical daughter cells with identical genetic material.mitosis- cell division
mitosis- cell divisionCybil Nomthandazo Khumalo
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This document discusses chromosomes, the cell cycle, and mitosis. It notes that chromosomes form during cell division and contain DNA and genes. The cell cycle consists of interphase, mitosis, and cytokinesis, resulting in two identical cells. Mitosis allows organisms to grow, repair tissues, and reproduce. It occurs in somatic cells and includes prophase, metaphase, anaphase, and telophase where chromosomes separate and two daughter cells form. Cancer occurs when cells lose cell cycle controls and continue dividing uncontrollably.Presentation1
Presentation1Phindile Ntuli
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The document discusses mitosis, the process of cell division that results in two identical daughter cells. It describes the stages of mitosis as interphase, prophase, metaphase, anaphase and telophase. During interphase, the cell grows and its DNA is replicated. In prophase, the nuclear envelope breaks down and chromosomes condense. Metaphase arranges the chromosomes at the center. Anaphase separates the chromosomes and cytokinesis completes the formation of two new daughter cells from the single parent cell.Mitosis(cell division)
Mitosis(cell division)Professor Ntsibande
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Chromosomes form through coiling and condensing of chromatin during cell division. Humans have 23 pairs of homologous chromosomes, for a total of 46. Each chromosome contains DNA and genes. The cell cycle involves interphase and mitosis, resulting in two identical daughter cells through cytokinesis. Mitosis consists of prophase, metaphase, anaphase, and telophase where the chromosomes align and separate. Cancer occurs when cell cycle controls are lost, allowing uncontrolled cell division and tumor formation.Cell Division
Cell DivisionJulie Roberts
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The document discusses different types of cell division: binary fission, mitosis, and meiosis. Binary fission is how prokaryotic cells divide, splitting their single DNA strand to form two identical daughter cells. Mitosis and meiosis are forms of cell division in eukaryotes. Mitosis produces two identical daughter cells through the phases of interphase, prophase, metaphase, anaphase and telophase. Meiosis involves two cell divisions and results in four haploid cells with half the normal genetic material.Unit2 cell cycle
Unit2 cell cyclemartamosquera
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The document summarizes the cell cycle and cell division. It discusses that DNA is tightly packaged in the nucleus and describes the stages of interphase where the cell grows and duplicates its DNA. It then explains the two main types of cell division: mitosis, where two identical daughter cells are produced for growth and tissue repair, and meiosis, the two cell divisions involved in sexual reproduction to produce gametes with half the normal chromosome number. The stages of mitosis and meiosis are outlined in detail. The document emphasizes that genetic recombination during meiosis contributes to genetic variability between offspring that is important for evolution.Mitosis simphiwe
Mitosis simphiweuj
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This document summarizes key aspects of cell division and chromosomes. It explains that chromosomes form through coiling of chromatin and contain genes made of DNA. Humans have 23 pairs of homologous chromosomes. The cell cycle is described, including the phases of interphase, mitosis, and cytokinesis. Mitosis allows organisms to grow and repair tissues. The specific stages of mitosis - interphase, prophase, metaphase, anaphase and telophase - are then outlined in detail. The roles of centrioles, spindle fibers and chromosomes are explained. Cancer is summarized as uncontrolled cell growth beyond a single layer due to loss of cell cycle controls.mitosis.pptx
mitosis.pptxCatherineJoy19
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There are two main types of cells: somatic cells that make up the body and germ cells or gametes that are involved in sexual reproduction. Mitosis is the process of cell division that results in two identical daughter cells. It occurs in somatic cells and is a form of asexual reproduction. The key stages of mitosis are interphase where the cell grows and duplicates its DNA, prophase where the chromosomes condense, metaphase where the chromosomes align, anaphase where the sister chromatids are separated, telophase where the nuclei reform, and cytokinesis where the cell cytoplasm divides forming two daughter cells with identical genetic material to the parent cell.0801 cell cycle
0801 cell cyclenaftzingerj
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Mitosis and the cell cycle are necessary for three key reasons:
1. Asexual reproduction, as seen in binary fission in bacteria.
2. To replace damaged or dead cells through growth and development.
3. Embryonic development in organisms occurs through cell division of cells like bone marrow and frog embryos.Science Subject for High School - 9th Grade_ The Building Blocks of Life by S...
Science Subject for High School - 9th Grade_ The Building Blocks of Life by S...venusbusalpa
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This document provides an overview of cellular reproduction and cell division topics to be covered over two class periods. The objectives are to understand cell reproduction at the molecular level focusing on DNA and chromosomes, describe the cell cycle, explain mitosis and meiosis, and compare mitosis and meiosis and their roles in cell division. Key terms like DNA, chromosomes, the cell cycle, mitosis, meiosis, and parts of chromosomes are defined. Stages of the cell cycle, mitosis, and meiosis are explained. The roles of cell division in growth, tissue repair, and reproduction are also summarized.Mitosis
MitosisSwastik Mishra
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Mitosis is the process of normal cell division where the parent cell divides into two daughter cells that are genetically identical to the parent cell. It involves several stages - prophase, metaphase, anaphase and telophase. During prophase, chromosomes condense and the nuclear envelope breaks down. In metaphase, chromosomes line up along the center of the cell. In anaphase, chromosomes separate and move to opposite poles. In telophase, the nuclear envelope reforms and cytokinesis occurs to separate the cell contents. Mitosis ensures genetic inheritance and growth and replacement of cells.Mitosiscellcycle2012
Mitosiscellcycle2012jjcorrea121
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Cells need to divide for both unicellular and multicellular organisms. Unicellular organisms like bacteria divide through binary fission to reproduce, while multicellular organisms use cell division to grow, repair damaged cells, and regenerate tissues. There are three main types of cell division: binary fission in prokaryotes, mitosis in eukaryotes which duplicates the cell's DNA and divides the nucleus and cytoplasm, and meiosis which forms sex cells like eggs and sperm. The cell cycle is the series of events that takes a cell from its formation from another cell until its own division into two new daughter cells. It involves an interphase of growth, DNA replication, and cell preparation followed by mitosis[7] CELL CYCLE _MITOSIS & MEIOSIS.ppt![[7] CELL CYCLE _MITOSIS & MEIOSIS.ppt](https://cdn.slidesharecdn.com/ss_thumbnails/7cellcyclemitosismeiosis-221113164347-59a6d1ec-thumbnail.jpg?width=560&fit=bounds)
[7] CELL CYCLE _MITOSIS & MEIOSIS.pptSaraiBelino
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The document summarizes the cell cycle process of mitosis and meiosis. It describes the main stages of interphase (G1, S, G2), mitosis (prophase, metaphase, anaphase, telophase, cytokinesis), and meiosis I and meiosis II. Interphase involves cell growth and DNA replication, while mitosis involves nuclear division into two identical daughter cells. Meiosis involves two nuclear divisions that result in four haploid daughter cells each with half the number of chromosomes of the original cell.際際滷share powerpoint
際際滷share powerpointCybil Nomthandazo Khumalo
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The document describes the process of mitosis cell division. It begins with interphase where the cell grows and its DNA is replicated. Then comes prophase where the chromosomes condense and the nuclear envelope breaks down. In metaphase the chromosomes line up at the center of the cell. Anaphase follows where the chromosomes are pulled to opposite poles. Telophase ends with two daughter nuclei forming. Finally cytokinesis separates the cytoplasmic contents into two daughter cells through a cleavage furrow in animal cells or cell plate in plant cells.Mitosis final
Mitosis finalMaria Donohue
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Cells undergo mitosis or meiosis to divide. Mitosis produces two identical daughter cells from one parent cell during normal cell growth and repair. Meiosis produces four haploid gametes from one diploid cell for sexual reproduction. During meiosis, homologous chromosomes pair up and may exchange DNA segments through crossing over, introducing genetic variation into the gametes. The first meiotic division separates homologous chromosomes, while the second division separates sister chromatids to produce four unique haploid cells.
AP Cell Cycle-Mitosis and Meiosis (1).ppt
AP Cell Cycle-Mitosis and Meiosis (1).pptChristineAnnLyneVeng
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The document summarizes the cell cycle process of mitosis and meiosis. It describes that the cell cycle consists of interphase and mitosis or meiosis. Interphase is divided into G1, S, and G2 phases where the cell grows and duplicates its contents in preparation for division. Mitosis is the process where the cell nucleus divides into two identical nuclei through the stages of prophase, metaphase, anaphase and telophase. Meiosis produces gametes through two cell divisions and involves homologous chromosome pairing, crossing over and separation into haploid cells with one chromosome of each type.Unit 3 cell division
- 2. The cell cycle includes the following phases: Interphase (include G1- , S- [DNA synthesis] and G2 phase) Mitosis Cytokinesis Growth The result is 2 identical cells.
- 3. Allow an organism to grow. Repairs damaged cells/tissue. Replace dead cells/tissue. Reproduction in some simple organisms.
- 6. Cell builds up enough energy for division process. DNA replication occurs Cell look normal, like before division
- 7. Nuclear envelope and nucleolus disappear. Chromatin become more tightly coiled, and condenses into individual chromosomes. Chromosomes arrange randomly in the cell. Centrioli move to opposite poles, with spindle fibers stretching between them.
- 8. The centrioli reached the opposite poles with the spindle fibers in between. The chromosomes arrange randomly on the equator, each single chromosome attaching to a separate spindle fiber by means of the centromere.
- 9. The spindle fibers pull tight. The centromers attaching the chromatids of the chromosomes split in half. Daughter chromosomes move to opposite poles.