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DNA at different phases chromatin chromosome histone nucleosome
DNA at different phases Chromatin - DNA + protein - before cell division (M phase) Chromosome - condensed chromatin during cell division Sister Chromatid - each individual double helix
FYI.. Body cells (autosomes/somatic cells) have 46 chromosomes or 23 pairs – Diploid – 2n Sex cells (gametes) have 23 chromosomes – Haploid - n
M phase Mitosis (nuclear division) Cytokinesis (cytoplasmic division)
Mitosis Nuclear division Cell growth stops Produces 2 similar daughter cells (2n) Asexual reproduction 1-2 hrs only Metaphase Checkpoint
Stages of Mitosis Prophase Metaphase Anaphase Telophase Cytokinesis
Prophase Chromatin thickens into chromosomes Nuclear membrane and nucleolus disintegrates Mitotic spindle forms Centrosome pairs move to opposite ends
Chromosomes at metaphase plate Centrosomes at opposite poles Kinetochores attached to microtubules
Secrets on how chromosomes move.. CentrosomeAster Sister chromatids Metaphase Plate Kinetochores Overlapping nonkinetochore microtubules Kinetochores microtubules Centrosome Chromosomes Microtubules 0.5 µm 1 µm Figure 12.7
Secrets.. Spindle pole Kinetochore
Centromeres divide Chromatids now chromosomes Kinetochore microtubules shorten - Chromosomes separate and move Nonkinetochore microtubules lengthen End: chromosomes at 2 poles
Chromosomes arrive at opposite poles Spindle fibers disintegrate Nuclear membrane reforms & Nucleolus reappears Chromatin fibers become less tightly coiled
Cytoplasm divides Animals: cleavage furrow divides cytoplasm Plant cells: cell plate Two daughter cells
Cell pinches inward
Daughter cells 1 µm Vesicles forming cell plate Wall of patent cell Cell plate New cell wall Cell Plate Formation
Mitosis in an Animal Cell
Cleavage furrow Centrioles ANIMAL CELL
Cell plate No centrioles PLANT CELL
Result of Cell Cycle two new daughter cells – identical to the parent cell in chromosome number and chromosome type net gain of only one cell two new daughter cells will enter interphase and the cycle will continue…
Mitosis Mitosis Click on the hyperlink above to watch a tutorial of the cell cycle.
Chapter 9 Cell Cycle and Mitosis. You Must Know The structure of the duplicated chromosome. The events that occur in the cell cycle (G 1, S, and G 2 )
Cell Cycle. Cell Division Cell division is the process where a parent cell divides into two daughter cells. There are two types of cell division: Mitosis.
Cells divide during mitosis and cytokinesis. Cells that make up the “body” of an organism 2.
MITOSIS & CYTOKINESIS. A genome –Is the complete set of an organism’s genes –Is located mainly on DNA in the cell’s nucleus NAMES FOR DNA in different.
Mitosis is divided into five phases: – Prophase – Prometaphase – Metaphase – Anaphase – Telophase/Cytokinesis Cytokinesis is well underway by late telophase.
How does the surface area to volume ratio affect a cell? The larger the surface area to volume ratio, the more efficiently the cell can get nutrients Why.
Chromosomes Diploid: contains 2 sets of chromosomes Body cells, 2n Haploid: contains 1 set of chromosomes Gametes, sex cells, n Sister chromatids-
Eukaryotic Cell Division Purpose Increase cell number for growth, maintenance, repair, or reproduction Cell Types Somatic Germ Cell Division Cycle Interphase.
5.2 Mitosis and Cytokinesis KEY CONCEPT Cells divide during mitosis and cytokinesis.
The Cell Cycle Ch. 12. Cell Cycle – life of a cell from its origin in the division of a parent cell until its own division into two. Cell division allows.
What is Mitosis? Main form of reproduction for some organisms like the hydra (freshwater jellyfish). Process is called budding and is asexual reproduction.
Chromosomes and Cell Reproduction Objectives: 1.Identify different types of cell division 2.Differentiate between a gene, a DNA molecule, a chromosome,
Stages of the Cell Cycle Divided into 2 main stages 1.Interphase- G1, S, G2 2.Mitotic Phase- M.
THE CELL CYCLE AND MITOSIS UNIT 3 ORGANIZATION AND DEVELOPMENT.
The Cell Cycle & Cell Division. The Cell Cycle
10.2b Cell DivisionCell Division. 2 Phases of the Cell Cycle The cell cycle consists of Interphase – normal cell activity The mitotic phase – cell.
The Cell Cycle & Mitosis “Omnis cellula e cellula.” “Every cell from a cell.” —Rudolph Virchow, Germany, 1855.
Chapter 9 Mitosis and Meiosis Review graphics. Fig µmChromosomes Chromosome duplication (including DNA synthesis) Chromo- some arm Centromere.
Ms. Napolitano & Mrs. Haas CP Biology. Interphase: cell growth G 1, S, & G 2 phases combined M Phase: cell division Mitosis – division of the.
S (DNA synthesis) G1G1 G2G2 Cytokinesis Mitosis I NTERPHASE M ITOTIC PHASE (M)
Cell Cycle *Cellular Division. Reproduction ●Asexual reproduction: generates offspring that are genetically identical to a single parent. Requires only.
Section 9-2 : Mitosis & Cytokinesis. Essential Questions What are the events of each stage of mitosis? What is the process of cytokinesis?
Mitosis and Cell Division. Mitosis Cells divide to make more cells. -this allows organisms to grow, develop, maintain and repair themselves Mitosis is.
Animated Mitosis Cycle Interphase Prophase Metaphase Anaphase Telophase Cytokinesis.
CELL DIVISION TOPIC 2.5. ASSESSMENT STATEMENTS Outline the stages in the cell cycle, including interphase (G1, S, G2), mitosis and cytokinesis
Stages of Mitosis What’s happening and where are things moving to?
Campbell and Reece, Chapter 12 p , Edulink and learning guide notes.
Lesson Overview Lesson Overview The Process of Cell Division Lesson Overview 10.2 The Process of Cell Division.
Mitosis & Meiosis. Chromosome Structure Chromatin – Thin, uncoiled strands of DNA & proteins (histones) Chromosomes – Rod-shaped structures composed.
The Cell Cycle. What is the cell cycle? The Stages of the life of the cell Involve: 1. Metabolic activities 2. Division.
1.7 Cell Division. Cell Division Cell division is the process where a parent cell divides into two daughter cells. There are two types of cell division:
Binary Fission: Cell Division in Prokaryotic Cells asexual reproduction in which one cell divides into two identical daughter cells.
Cell Division. Cell division – parent cell divides into 2 daughter cells 2 types of cell division: 1) mitosis – division of somatic (body) cell to produce.
Cell Reproduction and Growth Cell Division M C. Limits on Cell Size Diffusion is more efficient over short distances DNA limitations (has to be able to.
Mitosis and the Cell Cycle Division of the nucleus and the nuclear material (DNA), as well as the cell.
Lecture ???Date ______ Chapter 12~ The Cell Cycle.
Cytokinesis (2 nd part of M phase) TWO new nuclei are now in one cytoplasm Cytokinesis: Division of the cytoplasm Animal Cells: The membrane pinches inward.
The Cell Cycle Start G S G Mitosis.
The Cell Cycle 4 phases exist in the cell cycle for somatic (body) cells. – During cell reproduction the chromatin will condense into chromosomes. We have.
Stages of Mitosis. Mitosis (M Phase) The M Phase consists of: Mitosis and Cytokinesis Four Stages of Mitosis: P rophase M etaphase A naphase T elophase.
CHAPTER 12 The Cell Cycle. The Key Roles of Cell Division cell division = reproduction of cells All cells come from pre-exisiting cells Omnis cellula.
MITOSIS. Asexual Reproduction Reproduction with only one parent offspring are identical to parents.
M-Phase Prophase – Metaphase – Anaphase – Telophase Prophase – chromatin begins to tightly coil (condenses) – nuclear envelope begins to disappear – nucleoli.
1 Review What are chromosomes Compare and Contrast How does the structure of chromosomes differ in prokaryotes and eukaryotes 2 Review What happens during.
CELLULAR REPRODUCTION BINARY FISSION & THE CELL CYCLE (INTERPHASE – MITOSIS – CYTOKINESIS)
1 The Cell Cycle and How Cells Divide. 2 Review: Vocabulary - Chromosomes Chromosome: “spool” to hold DNA in the nucleus Homologous: pairs of chromosomes.
Cell Reproduction in Bacteria Binary Fission: asexual reproduction producing genetically identical cells.
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