11/7/20111BIOLOGY 3 CH-9 REVIEWWORKSHOPContentsContentsContentsContentsGenetic ConceptsSingle Gene InheritanceMultiple Gene InheritanceSex-linked InheritanceFigure B: Anatomy of pea plantFigure A: Gregor Mendal; “the father of modern genetics”Character TraitColor Purple# of stamen 7Table 1: Examples of characters and traits of Figure B11/7/20112CharacterCharacterCharacterCharacter TraitTraitTraitTraitTable 2:Table 2:Table 2:Table 2: The seven pea characters studied by MendalFigure C: Crosses taking one character (flower color)AllelesPpGenotype PhenotypePP PurplePp Purplepp WhiteTable 3: Possible allelesTable 4: Possible genotypes and phenotypesFigure D: Explains Figure C in terms of allele distribution; discussing genotypes and phenotypes11/7/20113Homologous Chromosomes Homologous Chromosomes Homologous Chromosomes Homologous Chromosomes –––– Alleles Alleles Alleles Alleles Homologous Pairs 1Chromosomes 2Gene Loci 3Alleles P, a, B, bGenotypes PP, aa, BbFigure E: Homologous Chromosomes with labeled componentsTable 5: Explanation of Figure EThe Punnet Square___AllelesG (Dom)g (Rec)Genotypes Phenotypes Prob.GG Green Eyes 25%Gg Green Eyes 50%gg Blue eyes 25%Gg x GgGGGGggggGGGGggggGGGGGGGG GgGgGgGgGgGgGgGg ggggggggGenotypesGGGgggPhenotypesGG Green EyesGg Green Eyesgg Blue EyesIndependent Assortment11/7/20114Inherited DisordersInherited DisordersInherited DisordersInherited DisordersFigure F: Child with Cystic Fibrosis (Recessive Disorder)Figure G: Dr. Michael C. AinAchondroplasia (Dominant Disorder)Incomplete DominanceGenotypes PhenotypesRRRrrrText H: Sickle-Cell disease; example of a pleiotropy (single gene influencing multiple characters)Pleiotropy11/7/20115Polygenic InheritanceLinked GenesCrossing Over11/7/20116Crossing Over (cont.)Sex ChromosomesSex-linked
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