Saturday, June 24, 2017

3.25: Understand that Division of a Cell by Meiosis Produces Four Cells, Each with Half the Number of Chromosomes, and that this Results in the Formation of a Genetically Different Haploid Gametes

MEIOSIS: Two Cell Divisions that Produces Four Haploid Cells that are Not Genetically Identical

MEIOSIS
Diagram Showing the Cell Division by Meiosis
PROCESS:
  • Each Chromosome makes Identical Copies of itself
  • First Division: Chromosomes will Line Up at the Centre of the Cell where Cell Fibres will Pull them Apart, Each New Cell will have One Copy of Each Chromosome (Both Mother’s and Father’s)
  • Second Division: Chromosomes will Line Up at the Centre of the Cell where Cell Fibres will Pull them Apart
  • A Total of Four Haploid Daughter Cells will be Produced
IMPORTANCE:
  • Production of Gametes E.g Sperm Cells and Egg Cells, Pollen Grains and Ovum
  • Increases Genetic Variation of Offspring

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