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Biology: A Guide to the Natural World with mybiology" (4th Edition)

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KroghF09.011 Mendel Feb. 25, 2011 Topic 8: Mendel’s Genetic Laws Chapter 11 Terms to Know and Use Genetics is the careful study of patterns of inheritance. These patterns were not well understood by people until the 20 th century. New words were invented to describe these patterns. You must understand these words to understand genetics. I have grouped the words in a certain way. See if you can figure out the pattern. Character ~ Gene Dominant Trait ~ Allele Recessive True Breeding ~ Homozygous Phenotype Hybrid ~ Heterozygous Genotype Law of Segregation Law of Independent Assortment P Parental Generation F 1 First Filial Generation F 2 Second Filial Generation I. The Times of Gregor Mendel? A. Biographical Sketch: "The Father of the Science of Genetics" Fig. 11.1 B. Contemporary Theories of Inheritance: Blending II. Mendel’s Work 1856-1863 A. Why his Work Was Diferent 1. Followed his experimental crosses for several generations 2. Controlled experiments with "true-breeding" varieties
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Unformatted text preview: 3. Carefully counted the offspring 4. Chose a very good subject B. Nobody Understood his Work Until 1900 p. 219 C. Sexual Reproduction in Plants Fig. 11.2, 11.3 D. Heritable Characteristics Studied: Table 11.1 III. The Law of Segregation Fig. 11.5, 11.6 A. Seen in Monohybrid Crosses B. No Blending: Factors are Conserved C. F 1 Exhibits the Dominant Trait D. Based on Separation of Homologous Chromosomes IV. The Law of Independent Assortment A. Illustrated in Dihybrid (or higher) Crosses Fig. 11.9 B. The Two Characters do not Affect Each Other C. Based on Independent Assortment of Chromosomes in Meiosis V. Variations and Additions to Mendel's Laws A. Incomplete Dominance Fig. 11.10 B. Co-dominance (Blood Types) Fig. 11.11 C. Multiple Alleles (Blood Types) D. Polygenic Traits (Parakeet Color) VI. Nature vs. Nurture - Genes and the Environment Fig 11.13...
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