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The cell cycle and mitosis
Cells constantly reproduce exact duplicates of themselves. Why?Replacement Repair Growth
Cells must make an exact copy of their DNADNA is the blueprint of the cell and is found in the nucleus
Cell growth and division happens in a series of recognizable steps called the Cell CycleRephrase: what is the cell cycle?
Cell cycle has three phases1. Interphase Cell growth DNA replication occurs 2. Mitosis Nuclear division 2 daughter cells formed, each has identical DNA 3. Cytokinesis 2 identical cells
DNA forms chromosomes-For most of the cell’s life, DNA is arranged “loosely” in the form of chromatin During mitosis DNA condenses into chromosomes
Interphase Longest phase Cell growsChromosomes are duplicated- each duplicate is called a sister chromatid
Prophase Nuclear envelope breaks downSister chromatids joined at centromere Centrioles move to opposite ends and the spindle fibers form between them
Metaphase Short Spindle fibers attach to centromereSister chromatids line up along midline
Anaphase Sister chromatids are pulled apart by the spindle fibers
Telophase Final phase of mitosis- opposite of prophaseChromatids reach opposite poles Nuclear envelope reforms Chromosomes unwind
Cytokinesis Cytoplasm divisionCytokinesis differs between plants and animals- why?
_dnadivide/ Cell Growth Mrs. Harlin.
The Cell Cycle and Mitosis
Mitosis Divide and conquer. How do cells multiply? Cell cycle – process where: DNA contained in chromosomes duplicates Parent cell divides each new cell.
Bell Ringer: No paper needed Why do cells divide?.
The cell cycle: interphase, mitosis, cytokinesis.
MITOSIS. Mitosis and the Cell Cycle Sexual reproduction – combining genetic info from 2 organisms of the same species to create offspring Asexual reproduction.
The Cell Cycle & Cell Division. The Cell Cycle
The Cell Cycle.
Bellwork What are the stages of the cell cycle? Which stage is dna synthesized? Which stage is characterized by increase in cytoplasm and organelles? Which.
Cell Division A cell grows in size by increasing both the size and the number of its cells. Then 2 grow and divide, forming and so on. Cell Cycle: The.
The Cell Cycle Cell Division.
Mitosis Flash Cards Ch 4.
Activity #44 PHASES OF THE CELL CYCLE. 6 Phases of the Cell Cycle 1.Interphase 2.Prophase 3.Metaphase 4.Anaphase 5.Telophase 6.Cytokinesis.
Cell Cycle. Why do cells divide? Growth --by adding cells, not having them get bigger --cells are not efficient for exchanging materials if they are too.
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.
Cell Growth & Division Mitosis. Why do Cells Reproduce? Growth of an organism Replacement of old or damaged cells.
Phases of the Cell Cycle Interphase and Mitosis. Interphase G1 : Cell Grows G1 : Cell Grows S : DNA is copied (to produce a diploid # S : DNA is copied.
Mitosis. Common to most living things Sequence of growth and division of a cell.
Chapter 11 review Ms. Parekh.
CELL CYCLE How many cells do we begin with? 2 How do we get more?
Chapter 10 Cell Growth and Division
10 – 2 Cell Division Mitosis. Chromosomes DNA is passed on in chromosomes DNA is passed on in chromosomes Every organism has a specific # of chromosomes:
EQ: What are the 4 stages in Mitosis and what happens during each stage?
What term describes DNA in G1 phase? Chromatin. What happens to the DNA in S Phase? What is DNA called? Doubled, duplicated, copied Chromatin.
Cell Division. Why? Cells divide for many reasons: – In order to stay small Diffusion occurs at a faster, more efficient rate in smaller cells. – DNA.
MITOSIS the key to growth.
10.2 The Process of Cell Division
Mitosis and the Cell Cycle Division of the nucleus and the nuclear material (DNA), as well as the cell.
The cell cycle Mitosis is only one section of the life cycle of a cell. Interphase is the main part of the cell cycle. This is where DNA is replicated.
The Cell Cycle The cell cycle includes the process in which single cells divide to form TWO identical cells with the SAME number of chromosomes.
Unit 3 Part 2 – The Cell. PROKARYOTIC CELLSEUKARYOTIC CELLS No nucleus. No membrane bound organelles. (ex. mitochondria, vacuole, chloroplast) A.)
Cell Division Mitosis. Chromosomes Eukaryotes Found in the nucleus Contain most of the genes Made up of two sister chromatids, joined by a centromere.
Animated Mitosis Cycle Interphase Prophase Metaphase Anaphase Telophase Cytokinesis.
The Cell Cycle and MitosisCell Cycle. Chromosomes o Made of DNA o Each chromosome consists of two sister chromatids attached at a centromere.
It’s The circle of cell life How do cells reproduce and grow?
Cell Growth and Division
The Cell Cycle. Life Cycle of a Cell Before a growing cell becomes too large it divides The division results in two essentially identical cells called.
The Cell Cycle. THE CELL CYCLE The Cell Cycle Cell Reproduction –One cell (parent cell) reproduces to make 2 identical cells (daughter cells)
What’s happening and where are things moving to?
Cell Division In eukaryotes, cell division occurs in two major stages.
Review of Cell Cycle I play music at the club. Name the 3 Parts of the Cell cycle 1) Interphase: Gap 1 : growing, carying out normal cell function. Synthesis:
The Cell Cycle Interphase Mitosis Cytokinesis. How do little elephants grow up to be BIG elephants?
Section 10.2 (Pg ): The Process of Cell Division
Chapter 10.2 Cell Division.
3/6/2016 Cell Division Cell divides into two daughter cells.
The Cell Cycle Start G S G Mitosis.
The Cell Cycle and Cell Division
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