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Meiosis

Meiosis. John Ireland, Ph.D. Topics to Cover . Sexual Reproduction Features of Meiosis Meiosis Meiosis vs. mitosis. Sexual Reproduction. Meiosis allows for a reduction of the number of chromosomes in sex cells Germ-line cells (haploid) are set aside and produced through meiosis.

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Meiosis

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  1. Meiosis John Ireland, Ph.D.

  2. Topics to Cover • Sexual Reproduction • Features of Meiosis • Meiosis • Meiosis vs. mitosis

  3. Sexual Reproduction • Meiosis allows for a reduction of the number of chromosomes in sex cells • Germ-line cells (haploid) are set aside and produced through meiosis

  4. Structure of Meiosis Synaptonemal Complex Turn sideways And stack on Top of each other Homologous Pair

  5. Homologous Recombination • Areas of Homology can exchange in the Synaptonemal complex, exchanging information between chromstids. • Areas where there is cross over are called chiasmata.

  6. Meiosis

  7. Features of Meiosis vs. Mitosis • Homologous recombination in Prophase I • Cosegregation of sister chromatids in Anaphase I, due to cohesin proteins remaining intact • The attachment of sister kinetochores to the same pole in meiosis, opposite poles in mitosis. • Suppression of S phase between meiosis I and II

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