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An Introduction to Genetic Analysis FiMnEetitioitm' Anthony J. F. Griffiths University of British Columbia j Jeffrey H. Miller University of California, Los Angeles David T. Suzuki University of British Columbia Richard C. Lewontin Harvard University William M. Gelbart Harvard University IS W. H. Freeman and Company / New York Contents in Brief 1 Genetics and the Organism 2 Mendelian Analysis 3 Chromosome Theory of Inheritance 4 Extensions of Mendelian Analysis 5 Linkage I: Basic Eukaryotic Chromosome Mapping 6 Linkage II: Special Eukaryotic Chromosome Mapping Techniques 7 Gene Mutation 8 Chromosome Mutation I: Changes in Chromosome Structure 9 Chromosome Mutation II: Changes in Number 10 Recombination in Bacteria and Their Viruses 11 The Structure of DNA 12 The Nature of the Gene 13 DNA Function 1 19 50 87 118 149 178 205 241 265 304 333 374 14 Recombinant DNA 15 Applications of Recombinant DNA 16 The Structure and Function of Eukaryotic Chromosomes 17 Control of Gene Expression 18 Mechanisms of Genetic Change I: Gene Mutation 19 Mechanisms of Genetic Change II: Recombination 20 Mechanisms of Genetic Change III: Transposable Genetic Elements 21 The Extranuclear Genome 22 Developmental Genetics: Cell Fate and Pattern Formation 23 Developmental Genetics: Topics in Gene Regulation and Differentiation 24 Quantitative Genetics 25 Population Genetics 415 440 467 491 529 561 579 605 636 671 703 737 Contents Preface XII GENETICS AND THE ORGANISM Genetics and Human Affairs Genetics and Biology Genes and Environment I Techniques of Genetic Analysis Summary Concept Maps 1 2 6 8 15 17 18 MENDELIAN ANALYSIS 19 Mendel's Experiments Simple Mendelian Genetics in Humans Simple Mendelian Genetics in Agriculture Variants and Genetic Dissection Summary 20 30 38 41 42 Concept Map 42 • Chapter Integration Problem 42 ' Solved Problems 43 • Problems 45 Mendelian Genetics and Life Cycles Summary 74 79 Concept Map 80 • Chapter Integration Problem 80 • Solved Problems 81 • Problems 82 EXTENSIONS OF MENDELIAN ANALYSIS 87 Variations on Dominance Multiple Alleles Lethal Alleles Several Genes Affecting the Same Character Penetrance and Expressivity Summary Concept Map 105 • Chapter Integration Problem 106 • Solved Problems 107 • Problems 109 88 89 91 94 103 104 LINKAGE I: BASIC EUKARYOTIC CHROMOSOME THEORY OF INHERITANCE 50 Mitosis and Meiosis The Chromosome Theory of Heredity Sex Chromosomes and Sex Linkage The Parallel Behavior of Autosomal Genes and Chromosomes 51 58 66 72 CHROMOSOME MAPPING 118 The Discovery of Linkage Recombination Linkage Symbolism Linkage of Genes on the X Chromosome Linkage Maps Three-Point Testcross 119 121 123 124 124 128 Contents VIII Interference T h e / 2 Test Early Thoughts on the Nature of Crossing-Over Linkage Mapping by Recombination in Humans Summary 130 132 Duplications Summary Concept Map 229 • Chapter Integration Problem 229 • Solved Problems 230 • Problems 233 135 137 138 CHROMOSOME M U T A T I O N II: CHANGES IN NUMBER Concept Map 139 • Chapter Integration Problem 139 Solved Problems 140 Problems 142 6 LINKAGE II. SPECIAL EUKARYOTIC CHROMOSOME MAPPING TECHNIQUES Accurate Calculation of Large Map Distances Analysis of Single Meioses Mitotic Segregation and Recombination Mapping Human Chromosomes Summary Euploidy Aneuploidy Chromosome Mechanics in Plant Breeding Summary 149 150 154 10 162 165 168 GENE M U T A T I O N 178 Somatic Versus Germinal Mutation Mutant Types The Occurrence of Mutations Selective Systems Mutation and Cancer Mutagens in Genetic Dissection Mutation Breeding Summary 179 181 184 188 195 198 199 200 Concept Map 201 • Chapter Integration Problem 201 • Solved Problems 201 • Problems 203 8 CHROMOSOME M U T A T I O N I: CHANGES IN CHROMOSOME STRUCTURE The Topography of Chromosomes Types of Changes in Chromosome Structure 205 206 210 241 242 250 257 259 Concept Map 259 • Chapter Integration Problem 259 • Solved Problems 260 • Problems 261 RECOMBINATION IN BACTERIA AND THEIR VIRUSES Working with Microorganisms Bacterial Conjugation Bacterial Recombination and Mapping the E. coli Chromosome Bacterial Transformation Bacteriophage Genetics Transduction Mapping of Bacterial Chromosomes Bacterial Gene Transfer in Review Summary Concept Map 169 • Chapter Integration Problem 169 • Solved Problems 170 • Problems 172 7 215 229 265 266 267 276 280 282 289 293 294 294 Concept Map 296 • Chapter Integration Problem 296 • Solved Problems 296 • Problems 298 11 T H E STRUCTURE OF DNA DNA: The Genetic Material The Structure of DNA Replication of DNA Mechanism of DNA Replication DNA Replication in Eukaryotes DNA and the Gene Summary Concept Map 330 • Chapter Integration Problem 330 • Solved Problems 330 • Problems 330 304 305 307 313 320 326 327 329 Contents IX THE NATURE OF THE GENE 333 How Genes Work Gene-Protein Relationships Genetic Observations Explained by Enzyme Structure Genetic Fine Structure Mutational Sites Complementation Summary 334 337 348 350 355 361 365 Concept Map 365 • Chapter Integration Problem 365 • Solved Problems 366 • Problems 367 DNA 16 374 FUNCTION Overview Transcription Translation The Genetic Code Protein Synthesis Universality of Genetic « Information Transfer ^ Eukaryotic RNA Mechanism of Gene Splicing Review Summary Recombinant DNA Technology in Eukaryotes: An Overview Trans genie Yeast Trans genie Plants Transgenic Animals Screening for Genetic Diseases Identifying Disease Genes Summary Concept Map 461 • Chapter Integration Problem 461 • Solved Problems 464 • Problems 465 \ 375 375 382 383 391 One DNA Molecule per Chromosome The Role of Histone Proteins in Packaging DNA Higher Order Coiling Heterochromatin and Euchromatin Chromosome Bands Centromeric DNA Sequence Organization Replication and Transcription of Chromatin Summary 398 400 402 407 407 Concept Integration p g p Mapp 410 • Chapter bl l d Problems bl Problem 410 Solved 410 Problems 411 RECOMBINANT DNA Restriction Enzymes The Formation of Recombinant DNA Recombinant DNA Methodology Recombinant DNA and Social Responsibility Summary 419 423 433 434 Concept Map 436 • Chapter Integration Problem 436 • Solved Problems 436 • Problems 436 f5 | APPLICATIONS OF RECOMBINANT D N A 440 ? i Applications of Recombinant DNA Technology Using Prokaryotes 441 450 453 453 459 461 467 468 470 471 474 475 477 478 487 488 Concept Map 488 • Chapter Integration Problem 488 • Solved Problem 488 • Problems 488 415 416 THE STRUCTURE AND FUNCTION OF EUKARYOTIC CHROMOSOMES 444 445 17 C O N T R O L OF GENE EXPRESSION 491 Basic Control Circuits Discovery of the lac System: Negative Control Catabolite Repression of the lac Operon: Positive Control Dual Positive and Negative Control: The Arabinose Operon Metabolic Pathways The Tryptophan Genes: Negative Control with Superimposed Attentuation The I Phage: A Complex of 492 Operons 493 500 503 505 505 509 Contents Multioperon Repression Structure of Regulatory Proteins Transcription: Gene Regulation in Eukaryotes—An Overview Cis Control of Transcription Trans Control of Transcription 5-Methylcytosine Regulation Post-Transcriptional Control Control of Ubiquitous Molecules in Eukaryotic Cells Summary 511 512 20 512 513 515 521 521 Insertion Sequences Transposons Phage mu Mechanism of Transposition Rearrangements Mediated by Transposable Elements Review of Transposable Elements in Prokaryotes Ty Elements in Yeast Transposable Elements in Drosophila Retroviruses Transposition via an RNA Intermediate Controlling Elements in Maize Review of Transposable Elements in Eukaryotes Summary 521 524 Concept Map 525 • Chapter Integration Problem 525 • Solved Problems 525 • Problems 526 18 MECHANISMS OF GENETIC CHANGE I: GENE M U T A T I O N The Molecular Basis of Gene Mutations Spontaneous Mutations Induced Mutations Reversion Analysis The Relationship Between Mutagens and Carcinogens Biological Repair Mechanisms Summary 529 531 532 539 547 547 549 558 Concept Map 558 • Chapter Integration Problem 558 • Solved Problems 558 • Problems 559 19 MECHANISMS OF GENETIC CHANGE II: RECOMBINATION General Homologous Recombination The Holliday Model Enzymatic Mechanism of Recombination Site-Specific Recombination Recombination and Chromosomal Rearrangements Duplication and Evolution Summary Concept Map 575 • Chapter Integration Problem 575 • Solved Problems 575 • Problems 576 561 562 563 571 572 575 575 575 MECHANISMS OF GENETIC CHANGE III: TRANSPOSABLE GENETIC ELEMENTS 579 580 583 586 587 592 592 592 593 596 597 598 602 603 Concept Map 603 • Chapter Integration Problem 603 • Solved Problem 604 • Problems 604 21 T H E EXTRANUCLEAR GENOME Variegation in Leaves of Higher Plants Cytoplasmic Inheritance in Fungi Shell Coiling in Snails: A Red Herring Extranuclear Genes in Chlamydomonas Mitochrondrial Genes in Yeast An Overview of the Mitochrondrial Genome An Overview of the Chloroplast Genome Mitochondrial Diseases in Humans Extragenomic Plasmids in Eukaryotes How Many Copies? Summary Concept Map 627 • Chapter Integration Problem 628 • Solved Problems 629 • Problems 630 605 607 609 611 612 615 620 623 624 625 626 627 Contents XI DEVELOPMENTAL GENETICS:, CELL FATE AND PATTERN FORMATION | Cell Fate: When Do the Cells and Nuclei of Higher Organisms Lose Their Totipotency? Pattern Formation: The Establishment of the Basic Animal Body Plan Mutational and Molecular Analyses of the Basic Body Plan Communication Between Cells and the Establishment of Cell Fate Homeotic Mutations and the Establishment of Segment Identity^ Applying the Fly and Worm Lessons to Other Organisms Summary 24 636 637 640 645 655 Proteins as Determinants of Cellular Characteristics Regulating the Synthesis of Proteins Transcriptional Regulation by Tissue-Specific Enhancers Integration of Transcriptional Control between Different Tissues Transcript Processing and TissueSpecific Regulation Applications of Regulatory Mechanisms to Cell Differentiation Cancer as a Developmental Genetic Disease Summary Concept Map 699 • Chapter Integration Problem 699 • Solved Problems 700 • Problems 701 704 713 715 716 718 721 725 727 727 732 737 738 738 747 680 Darwin's Revolution ' Variation and Its Modulation The Sources of Variation The Effect of Sexual Reproduction on Variation Selection Balanced Polymorphism Multiple Adaptive Peaks Artificial Selection Random Events A Synthesis of Forces The Origin of Species Summary 682 Concept Map 770 • Chapter Integration Problem 770 • Solved Problems 770 • Problems 772 1) DEVELOPMENTAL GENETICS: TOPICS IN GENE REGULATION AND DIFFERENTIATION Some Basic Statistical Notions Genotypes and Phenotypic Distribution Norm of Reaction and Phenotypic Distribution The Heritability of a Trait Determining Norms of Reaction Quantifying Heritability Counting and Locating the Genes Gene Action More on Analyzing Variance Summary POPULATION GENETICS Concept Map 666 • Chapter Integration Problem 666 • Solved Problems 667 • Problems 668 » 23 703 Concept Map 733 • Chapter Integration Problem 733 • Solved Problems 734 • Problems 734 659 661 665 QUANTITATIVE GENETICS 671 672 672 676 25 750 755 760 762 763 765 766 768 769 682 690 699 Further Reading Glossary Answers to Selected Problems Index 775 783 803 825