Chromosomes

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Chromosomes

• Diploid contains 2 sets of chromosomes
• Body cells, 2n
• Haploid contains 1 set of chromosomes
• Gametes, sex cells, n
• Sister chromatids- 2 identical chromatids held
  together by a centromere
• Kinetochores protein complex that develops on
  either side of centromere.

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Phases of Mitosis

• Prophase
• Centrosomes have duplicated
• Chromatin condenses into chromosomes
• Spindles forming
• Nucleolus and nuclear envelope disappear
• Metaphase
• Centromeres/chromosomes aligned along middle
• Spindles attach to kinetochore
• Anaphase
• Sister chromatids are pulled apart and daughter
  chromosomes move toward opposite poles.
• Cleavage furrow begins to form
• Telophase
• Nuclear envelope and nucleolus reappear.
• Chromosomes begin to uncoil

3
cytokinesis

• Division of the cytoplasm
• Animal cell
• Cleavage furrow forms
• Band of actin filaments (contractile ring), forms
  a circular constriction
• Plant cell
• Golgi apparatus forms vesicles which move along
  the microtubules to the region of a small disk
  seen between the 3 daughter plant cells
• Cell plate (newly formed plasma membrane) forms
  between the daughter cells

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• Mitosis Power Point Quiz

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Interphase
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Prophase
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Metaphase
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Anaphase
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cytokinesis
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• Chromosomes align along the middle

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• Spindle fibers form

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• Nuclear envelope appears

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• Chromosomes appear

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• Chromosomes uncoil

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• Chromosomes move to opposite poles

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• Growth and preparation for division

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• Centromeres divide