Mitosis I: Overview

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DesLee26
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186590
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Mitosis I: Overview
Updated:
2012-12-02 14:52:08
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Bio Final
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Biology
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  1. a.      The continuity of cell life is based on __, or reproduction of cells

    cell division
  2. a.      Cell Division roles
    •                                                               i.      Division of one prokaryotic cell reproduces entire organism, as is for unicellular eukaryote
    •                                                             ii.      Development of multicellular eukaryotes from single cell
    •                                                           iii.      Renewal and repair; replacement
  3. a.      __: life of a cell from the time it is formed from dividing parent cell until own division into two daughter cells
                                                                  i.      Passing identical genetic material is crucial 
    Cell cycle:
  4. a.      In both prokaryotes and eukaryotes, most cell division involves distribution of __—to two daughter cells
    b.      Cellular Organization
                                                                  i.      Cells’ genetic info= __
    1.      Eukaryotes have a lot of __ with enormous lengths
    • identical genetic material—DNA
    • genome
    • DNA molecules
  5.                                                               i.      Replication and distribution is managed because DNA molecules are packaged into __
    1.      Each contains __ and __
    a.      DNA molecule carries thousands of genes, which are __.
    b. Associated  
    proteins do what?
    • chromosomes
    • one DNA and associated proteins
    • the units of information that specify an organism’s inherited traits
    • maintain structure of the chromosomes and help control activity of genes
  6. 1.      Together the entire complex of DNA and proteins that is the building material of chromosomes is __, which varies in its degree of __during cell division
    • chromatin
    • condensation
  7.                                                               i.     
    Eukaryotes have __chromosomes

    1.     
    Human somatic cells (all except
    reproductive cells) have __(__ set[s] of __; one from each parent)

    2.     
    Reproductive cells, or __,
    have half that of somatic (__in humans)]
    • characteristicnumber of
    • 46
    • 2
    • 23
    • gametes
    • 23
  8. a.      Distribution During Eukaryotic Cell Division
                                                                  i.      When cell not dividing, and even as it prepares to replicate, each chromosome is in form of __ fiber
                                                                ii.      After DNA replication, the chromosomes __as part of cell division:
    1.      What happens to each chromatin fiber?
    • long, thin chromatin
    • condense
    • Each chromatin fiber becomes densely coiled and folded, making chromosomes shorter and thicker
  9.                                                               i.      Each duplicated chromosome has __, which are joined copies of the original chromosome
    1.      The two __, each having an identical DNA molecule, are attached all along their lengths by protein complexes called __, called__
    • two sister chromatids
    • chromatids
    • cohesins
    •  sister chromatid cohesion
  10. 1.      Each sister chromatid has a __, a region containing specific DNA sequences where the chromatid is attached most closely to sister
    a.      Attachment mediated by proteins bound to the c__ and gives condensed, duplicated chromosome a narrow waist
    2.      Part on either side of chromatid is __
    • centromere
    • entromeric DNA sequences
    • arm
  11.                                                               i.      Later in cell division process, two sister chromatids separate and move into two new __, one forming at each end
    1.      Separation= no longer sisters, but individual __
    a.      Each new nucleus receives a collection of chromosomes identical to that of the parent cell
    • nuclei
    • chromosomes
  12. a.      c__: division of the genetic material in the nucleus
    b.      __: division of the cytoplasm
    c.       Chromosome Number
                                                                  i.      Inherit __chromosomes, __from each parent, which combined in nucleus of cell when __ and __ form __
    • Mitosis
    • Cytokinesis
    • 46
    • 23
    • sperm and egg formed zygote
  13. a.      __and __produce __ cells and generate new cells to replace the dead and damaged ones
    b.      __are produced in __, which yields nonidentical daughter cells with only one set of chromosomes
                                                                  i.      Occurs in __and reduces chromosome number from __ to __
    • Mitosis
    • cytokinesis
    • somatic
    • Gametes
    • meiosis
    • gonads
    • 46 to 23
  14. a.     
    __fuses two gametes and
    returns chromosome number to __, and __conserves that number
    Fertilization

    • 46
    • mitosis

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