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chapter_8_powerpoint_le - Chapter 9 9.9 Meiosis Gametes...

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Chapter 9
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9.9 Meiosis Gametes (eggs and sperm) contain half the complement of chromosomes found in other cells The fusion of gametes is called fertilization or syngamy It creates the zygote , which contains two copies of each chromosome
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Contains two sets of chromosomes Sexual reproduction Involves the alternation of meiosis and fertilization Asexual reproduction Does not involve fertilization Contain one set of chromosomes
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9.10 The Sexual Life Cycle The life cycles of all sexually-reproducing organisms follows the same basic pattern Haploid cells or organisms alternate with diploid cells or organisms There are three basic types of sexual life cycles
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9.11 The Stages of Meiosis Meiosis consists of two successive divisions, but only one DNA replication Meiosis I Separates the two versions of each chromosome Meiosis II Separates the two sister chromatids of each chromosome Meiosis halves the number of chromosomes
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Meiosis I Prophase I
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chapter_8_powerpoint_le - Chapter 9 9.9 Meiosis Gametes...

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