Chapter 52 - Chapter 52 Sex and Reproduction I....

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Chapter 52 Sex and Reproduction I. Reproduction Reproduction = production of new organisms from existing ones, all life forms reproduce A. Asexual reproduction- reproduction without the union of haploid gametes 1. Fission – splitting into two,(binary fission) protozoa, flatworms, cnidaria 2. budding – rapid cell division forms a bud, often stays attached forming a colony cnidaria, porifera 3. Fragmentation & regeneration – lost or damaged body parts re grow into o new organism Asexual reproduction 4. parthenogenesis – offspring produced from unfertilized eggs common in arthropods (insects) some lizards *meiosis is suppressed or mitosis returns egg to diploid B. Advantages of asexual reproduction 1. works well in stable environments 2. rapid increase of numbers 3. isolated individuals can reproduce 4. sessile individuals can reproduce
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C. disadvantages of asexual reproduction 1. no variation 2. evolve slowly D. Sexual reproduction – union of haploid gametes forming a diploid zygote
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This note was uploaded on 05/10/2009 for the course BIOLOGY 21909 taught by Professor Jefffeaster during the Spring '09 term at Fullerton College.

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Chapter 52 - Chapter 52 Sex and Reproduction I....

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