Life Cycles, Meiosis - Meiosis and Sexual Meiosis Life...

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1 Meiosis and Sexual Meiosis and Sexual Life Cycles Life Cycles Meiosis is the basis of sexual reproduction Outline Outline 1. Key concepts 2. Heredity 3. Asexual and sexual reproduction 4. The roles of meiosis in life cycle 5. Life cycles 6. Meiosis 7. Origins of genetic variation 8. Key terms 9. Conclusions Key Concepts: Key Concepts: 1. Heredity is the transmission of traits from one generation to the next 2. Clone – a group of genetically identical individuals produced by asexual reproduction 3. The fusion of gametes called fertilization or syngame
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2 Key Concepts: Key Concepts: 4. Meiosis is the basis of sexual reproduction 5. Sexual reproduction dominates the life cycle of nearly all animals 6. Crossing over, random segregation, and random fertilization contribute to variation in traits among offspring Heredity Figure 13.1 The asexual reproduction of a hydra Asexual reproduction reproduction
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3 Sexual reproduction Sexual reproduction The roles of The roles of meiosis in life meiosis in life cycle cycle SEM of sea urchin sperm fertilizing egg Animal Life Cycle
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4 Fungus Life Cycle Human Life Cycle Figure 13.3 The human life cycle
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