Meiosis and Mitosis

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Meiosis and Mitosis

• Carly, Grace, Kellen, Emma

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Meiosis

• Produces Haploid gametes (sperm and egg cells)
• Reduced genetic material by half
• Used in sexual reproduction

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Mitosis

• Creates diploid cells (not sex cells)
• Daughter cells are identical to the mother cells
• Used for growth and repair

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Mitosis Meiosis
Number of divisions 1 2
Number of daughter cells 2 4
Results identical diploid (2n) daughter cells Reduction division results in haploid (n) cells
Genetically identical? Yes No
Chromosome Same as parent Half of parent
Where Somatic cells Sex cells
When Throughout life At sexual maturity
Role Growth and repair Sexual reproduction
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Phases of mitosis

• Interphase
• Prophase
• Metaphase
• Anaphase
• telophase

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Prophase

• Chromation condenses into chromosones
• Centriole separate and a spindle forms
• Nuclear envelope breaks down

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Metaphase

• Chromosones line up across the center of the cell
• Each chromosome is connected to a spindle fiber
  at its centromere

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Anaphase

• Sister chromatids separate into induvidual
  chromosomes and are moved apart

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Telophase

• Chromosomes gather at opposite ends of the cell
• Chromosomes lose their distinct shapes and two
  nuclear envelopes are formed