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Unformatted text preview: CHAPTER 13 OUTLINE Hereditary Similarity and Variation Heredity Transmission of traits over generations Variation In sexually reproducing organisms, offspring differ Genetics Study of heredity and hereditary variation Inheritance of Genes Offspring inherit genes on chromosomes Genes Are the units of heredity Each gene specific locus on a certain chromosome Comparison of Asexual and Sexual Reproduction Fig 13.2 In asexual reproduction genetically identical offspring mitosis Sets of Chromosomes Fig 13.3 In sexual reproduction offspring have unique combinations of genes In humans 46 chromosomes, made up of two sets One set of chromosomes comes from each parent Homologous chromosomes two chromosomes composing a pair same characteristics autosomes Sex Chromosomes Sex chromosomes Are distinct from each other in their characteristics...
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- Spring '09