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Meiosis Meiosis I Meiosis II Meiosis I • • • • • Interphase I Prophase I Metaphase I Anaphase I Telophase I Meiosis II • • • • • Interphase II Prophase II Metaphase II Anaphase II Telophase II Mitosis Meiosis Meiosis I Meiosis II Diploid Cell 2N = 4 Two Homologous Chromosomes Interphase 1 DNA is synthesized during the S phase Prophase I: (1)The duplicated chromosomes condense and become visible. (2) Spindle forms. (3) The nucleolus disperses (4) The nuclear membrane disperses (5) Homologous chromosomes pair (6) and cross over Metaphase I Paired homologous chromosomes align at the metaphase plate Anaphase I The homologues separate from each other, but sister chromatids remain linked at their centromeres Telophase I: Cytokinesis that follows produces 2 daughter cells, each has 2 chromosomes consisting of 2 sister chromatids Prophase II Metaphase II Anaphse II Telophase II Identify the following phase Identify the following phase Identify the following phase Identify the following phase Question 1 Homologous chromosomes A. Pair up during meiosis B. Are in pairs, one chromosome of each pair comes from the father and one from the mother C. May exchange parts during meiosis D. All the above Questions 2 & 3 True/False • Question 2: Asexual reproduction produces variations • Question 3: Sexual reproduction produces variations Answers • Question 1: D • Question 2: F • Question 3: T