Lecture #18 - Meiosis & Recombination

Ogan Gurel, MD Biology 301 Lecture # 18 Roosevelt University

Biology 301 Cellular and Molecular Biology Spring 2002

Lecture #18 - Meiosis & Recombination

Ogan Gurel, MD Biology 301 Lecture # 18 Roosevelt University

Overall Outline  Asexual and Sexual Reproduction  Meiosis  Origins of Genetic Variation: Recombination

Ogan Gurel, MD Biology 301 Lecture # 18 Roosevelt University

Asexual & Sexual Reproduction  Asexual reproduction in Hydra  Preparation of a karyotype  Human female chromosomes  Human male chromosomes  Human life cycle  Three classes of life cycles

Asexual reproduction in Hydra

Ogan Gurel, MD Biology 301 Lecture # 18 Roosevelt University

Preparation of a karyotype

Ogan Gurel, MD Biology 301 Lecture # 18 Roosevelt University

Human female chromosomes

Ogan Gurel, MD Biology 301 Lecture # 18 Roosevelt University

Human male chromosomes

Ogan Gurel, MD Biology 301 Lecture # 18 Roosevelt University

Human life cycle

Ogan Gurel, MD Biology 301 Lecture # 18 Roosevelt University

Three classes of life cycles

Ogan Gurel, MD Biology 301 Lecture # 18 Roosevelt University

Ogan Gurel, MD Biology 301 Lecture # 18 Roosevelt University

Meiosis  Review of mitosis I  Review of mitosis II  Overview of meiosis  Stages of meiotic cell division I  Stages of meiosis II  Comparison of mitosis and meiosis I  Comparison of meiosis and mitosis II

Review of mitosis I

Ogan Gurel, MD Biology 301 Lecture # 18 Roosevelt University

Review of mitosis II

Ogan Gurel, MD Biology 301 Lecture # 18 Roosevelt University

Overview of meiosis

Ogan Gurel, MD Biology 301 Lecture # 18 Roosevelt University

Stages of meiotic cell division I

Ogan Gurel, MD Biology 301 Lecture # 18 Roosevelt University

Stages of meiosis II

Ogan Gurel, MD Biology 301 Lecture # 18 Roosevelt University

Comparison of mitosis and meiosis I

Ogan Gurel, MD Biology 301 Lecture # 18 Roosevelt University

Comparison of meiosis and mitosis II

Ogan Gurel, MD Biology 301 Lecture # 18 Roosevelt University

Ogan Gurel, MD Biology 301 Lecture # 18 Roosevelt University

Origins of Genetic Variation: Recombination

 Independent assortment of homologous chromosomes  Crossing over & recombination during meiosis

Independent assortment of homologous chromosomes

Ogan Gurel, MD Biology 301 Lecture # 18 Roosevelt University

Crossing over & recombination during meiosis

Ogan Gurel, MD Biology 301 Lecture # 18 Roosevelt University