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Mitosis & Cytokinesis Cell Growth and Reproduction Ch. 8.2
Why do cells divide by Mitosis ? Growth &Repair Reproduction of single celled organisms under? conditions constant environment Amobea Reproducing
Cells dividing by Mitosis……. Identical to original cell Same chromosome # Identical chromosome makeup Skin
Cell Cycle 24 hours G or Growth 1 phase S or DNA Synthesis Growth 2 M or Mitosis phase //////
Where is DNA located ? 1. Nucleus 2. Chromosomes DNA
Duplicated Chromosome (Late Interphase): Sister Chromatids Centromere
Spindle & spindle fibers: Pull apart the sister chromatids Spindle fibers
Cytokinesis :cells cytoplasm divides & splits apart
Stages of Mitotic Cell Division Prophase Metaphase Anaphase Telophase 1st middle apart far or separate
Interphase Intermission Normal metabolic activities Major state DNA= chromatin
Late Interphase Prepares for mitosis DNA doubles= Sister chromatids Centrioles double in animals
Prophase Nuclear membrane disappears Doubled DNA = condensed chromosomes Spindle fibers
Metaphase Chromoso mes line up mid- cell Facing inward
Anaphase Chromosomes move to opposite poles at Centrioles in animals Spindle apparatus in plants
Telophase Cells divide Cell plate or membranes form Nucleus reappears
Returns to Interphase Intermission Normal metabolic activities Major state DNA=chromatin
Plant versus Animal Mitosis Plant: Cell wall from cell plate in telophase Sindles Animal: No cell wall membrane cytokinesis Centrioles
Animal Telophase Interphase
Plant Anaphase Interphase
Cancerous cells ……... 1.Divide too many times 2.Divide into more than two cells! Masses of cells = tumors benign malignant
The cell cycle and mitosis. Cells constantly reproduce exact duplicates of themselves. Why? Replacement Repair Growth.
Cell Cycle IPMATC. Cell Cycle 3 Parts: – Interphase – Mitosis Prophase Metaphase Anaphase Telophase – Cytokinesis.
Mitosis and the Cell Cycle Cell reproduction. Todays Objectives The student will be able to identify the phases of the cell cycle and mitotic stages by.
The Cell Cycle. Chromosomes Carry genetic information in eukaryotes Carry genetic information in eukaryotes Made of DNA and proteins Made of DNA and proteins.
Phases of Cell Division Interphase (stage between cell division) Interphase (stage between cell division) Prophase Prophase Metaphase Metaphase Anaphase.
Cell Cycle: M Phase Mitosis and Cytokinesis. Cell Division (M phase) Occurs in two stages – Mitosis (nuclear division) – Cytokinesis (cytoplasmic division)
Cellular Reproduction. Mitosi s I – Interphase: Period between division DNA molecules duplicate Single strands (chromatin threads) X shaped chromosomes.
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 4.8 Mitosis maintains the chromosome number of the parent.
M phase. DNA at different phases chromatin chromosome histone nucleosome.
Mitosis and Cytokinesis B-2.6 Summarize the characteristics of the cell cycle: interphase (called G1, S, G2); the phases of mitosis (called prophase, metaphase,
Cell Reproduction Prokaryotes Bacteria Eukaryotes Plants & animals copyright cmassengale.
MITOSIS. How do little elephants grow up to be BIG elephants?
Cell Division Mitosis Chapter 10. Why do cells divide, rather than continually grow forever? The larger a cell becomes, the more demands the cell places.
Cell Growth and Reproduction. Limitations on Cell Size Diffusion Larger the cell, the longer it takes to get nutrients from outside the cell through diffusion.
Cell Cycle Vocabulary and Notes Biology. Centrioles – one of two tiny structures located in the cytoplasm of animal cells near the nuclear envelope. Chromatid.
Copyright © by Holt, Rinehart and Winston. All rights reserved. How are autosomal cells and sex cells different? Question of the Day 2-25.
1 1 Mitosis and the Cell Cycle Pgs Big Idea: Mitosis is the process in which the nucleus divides to form two new nuclei and two cells with identical.
Mitosis: The Dance of the Chromosomes. Once Interphase is done the cell is ready to begin Mitosis. Mitosis is when the cell divides.
CELLS AND HEREDITY. Introduction November 30, 2010 New Vocabulary List – back of spiral –Title of new list – Heredity –DNA -- a molecule found in cells.
1 1 Asexual Reproduction Mitosis DSQ: Mitosis is the process in which the nucleus divides to form two new nuclei. How does mitosis differ in plants and.
Cell Division. Two Parts of Cell Division (1) Mitosis – (2) Cytokinesis.
Section 10-2 Cell Division Biology I Flora. Two Parts of Cell Division (1) Mitosis – division of the cell nucleus (2) Cytokinesis – Division of the cytoplasm.
Cell Cycle Cell Growth and Division. 2. Why do cells divide? If the cell is too big: If the cell is too big: Too much demand is placed DNA Too much demand.
The Cell Cycle Mitosis. The Cell Cycle The regular sequence of growth and division that cells undergo.
AP Biology Biology is the only subject in which multiplication is the same thing as division…
Cell Division and Mitosis. Understanding Cell Division What instructions are necessary for inheritance? How are those instructions duplicated for distribution.
Cell Growth and Division Honors Biology Chapter 10.
Cell Growth and Division Mitosis and Meiosis. Cell Growth When an organism grows, the number of cells increase but the size of each cell remains small.
Cellular Reproduction. Cellular Growth Cells grow until they reach their size limit, then they either stop growing or divide. A cells size is limited.
Cell Growth & Division Question: Why do cells divide? Cell Growth & Division Question: Why do cells divide?
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