Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 2 Sexual Reproduction Objectives Differentiate between asexual.

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Meiosis and Sexual Reproduction

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Presentation transcript:

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 2 Sexual Reproduction Objectives Differentiate between asexual and sexual reproduction. Identify three types of asexual reproduction. Evaluate the relative genetic and evolutionary advantages and disadvantages of asexual and sexual reproduction. Differentiate between the three major sexual life cycles found in eukaryotes. Chapter 7

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 2 Sexual Reproduction Chapter 7 2 types of reproduction Asexual ReproductionSexual Reproduction Definition a single parent passes copies of all of its genes to each of its offspring two parents each form reproductive cells that have ½ the number of chromosomes # of parents 12 Offspring Clones - organism that is genetically identical to its parent. Genetically different

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 2 Sexual Reproduction Chapter 7 Types of Asexual Reproduction DefinitionExample Fission Separation of a parent into 2 or more individuals Fragmentation Body breaks into several pieces; each may grow into a complete organism Budding New individuals split off from existing ones

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Sexual Reproduction Section 2 Sexual Reproduction Chapter 7

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Genetic Diversity Section 2 Sexual Reproduction Chapter 7 Asexual ReproductionSexual Reproduction Advantages produce many offspring in a short period of time, without using energy to produce gametes or to find a mate make different combinations of genes. This genetic diversity may increase the ability of species to adapt and succeed Disadvantage DNA of these organisms varies little between individuals. Organisms may not be able to adapt to new environment if environment change. Require energy to produce gametes and find a mate

Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu Section 2 Sexual Reproduction Chapter 7 ProcessDescriptionFunction Mitosis Produce 2 genetically identical diploid cells Makes new cells for growth, development, repair, and asexual reproduction Meiosis Produces four genetically different haploid cells Makes sex cells (gametes) for sexual reproduction.