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Meiosis.

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Presentation on theme: "Meiosis."— Presentation transcript:

1 Meiosis

2 Meiosis A type of cell division that produces four cells each with half the number of chromosomes as the parents Homologous Chromosomes: Two pairs of chromosomes that carry the same genetic material

3 Haploid and Diploid Haploid Diploid
A cell with a single set of chromosomes Shown as n A human has 23 chromosomes Diploid A cell with two sets of chromosomes Shown as 2n A human has 46 chromosomes as 2n

4 Produces 4 genetically different haploid cells Has two division stages
Meiosis Produces 4 genetically different haploid cells Has two division stages Meiosis I Meiosis II

5 Meiosis

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7 Meiosis I Prophase I Creation of homologous chromosomes
Tetrads are formed Homologous chromosomes crossover

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9 Meiosis I Metaphase I Anaphase I Telophase I and Cytokinesis
Tetrads line up Anaphase I Homologous chromosomes separate Telophase I and Cytokinesis Cells separate with homologous chromosomes

10 Meiosis I

11 Meiosis II Prophase II Metaphase II Anaphase II
Sister Chromatids Line up Anaphase II Sister Chromatids separate Telophase II and Cytokinesis Cells split and create haploid genetically different daughter cells

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15 Meiosis Creates four genetically different daughter cells
Crossing over creates genetic variation Only sex cells go through meiosis Gamete: A sex cell created by meiosis- Sperm or Egg

16 Mitosis VS. Meiosis Mitosis Meiosis Creates 2 identical daughter cells
Does not exchange or change genetics One stage Diploid Meiosis Creates 4 genetically different daughter cells Exchanges or changes genetics through crossing over Two stages Haploid

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