| List of figures |
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xi | |
| List of tables and boxes |
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xiii | |
| 1 Introduction: a curious disconnect |
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1 | (14) |
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1.1 Mutational origination as an evolutionary cause |
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1 | (4) |
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1.2 What this book is about |
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5 | (4) |
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9 | (2) |
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1.4 How the argument unfolds |
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11 | (2) |
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13 | (2) |
| 2 Ordinary randomness |
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15 | (20) |
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15 | (1) |
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16 | (1) |
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2.3 Uniformity or lack of pattern |
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16 | (4) |
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2.4 Stochastic or probabilistic |
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20 | (1) |
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21 | (1) |
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2.6 Subjectively unpredictable |
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22 | (2) |
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24 | (4) |
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28 | (2) |
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30 | (3) |
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33 | (2) |
| 3 Practical randomness |
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35 | (12) |
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35 | (1) |
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3.2 What good is a randomness assumption? |
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35 | (4) |
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39 | (1) |
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40 | (1) |
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41 | (2) |
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3.6 The random null hypothesis |
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43 | (1) |
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3.7 Beyond randomness: the principle of indifference |
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44 | (1) |
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45 | (2) |
| 4 Evolutionary randomness |
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47 | (20) |
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47 | (1) |
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4.2 Rejection of pervasively directed mutations |
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47 | (1) |
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4.3 Rejection of Lamarckism |
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48 | (4) |
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4.4 Independence from adaptation or evolution |
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52 | (1) |
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4.5 Independence from fitness effects |
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53 | (3) |
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4.6 Exceptions and possible exceptions to independence |
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56 | (4) |
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4.7 Conditional independence and related ideas |
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60 | (3) |
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4.8 Mutation and altered development |
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63 | (1) |
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64 | (3) |
| 5 Mutational mechanisms and evolvability |
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67 | (26) |
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67 | (1) |
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5.2 What a specially evolved mutation system looks like |
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68 | (2) |
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5.3 Specialized systems of germline mutation in microbes |
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70 | (7) |
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5.3.1 Multiple-inversion systems (shufflons) |
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70 | (1) |
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5.3.2 Diversity-generating retroelements |
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71 | (1) |
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5.3.3 CRISPR-Cas and piRNAs |
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71 | (3) |
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5.3.4 Multiple cassette donation |
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74 | (1) |
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75 | (1) |
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5.3.6 Mating-type switching |
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76 | (1) |
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5.4 Formulating plausible scenarios |
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77 | (5) |
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5.5 Challenges and opportunities |
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82 | (3) |
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5.6 Conditional independence and specialized mutation systems |
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85 | (1) |
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86 | (3) |
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89 | (4) |
| 6 Randomness as irrelevance |
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93 | (18) |
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93 | (1) |
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6.2 Arguments from analogy and metaphysics |
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94 | (4) |
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6.2.1 The "raw materials" metaphor |
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94 | (1) |
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95 | (1) |
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6.2.3 Levels and types of causes |
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96 | (2) |
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6.3 Direct empirical arguments |
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98 | (2) |
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6.4 Mechanistic arguments |
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100 | (3) |
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6.4.1 Creativity arguments |
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100 | (1) |
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6.4.2 Directionality: the "opposing forces" argument |
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100 | (2) |
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6.4.3 Initiative and rate: the "gene pool" arguments |
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102 | (1) |
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6.5 The methodological argument |
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103 | (2) |
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6.6 The explanatory argument |
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105 | (2) |
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106 | (1) |
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107 | (1) |
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107 | (4) |
| 7 The problem of variation |
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111 | (24) |
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111 | (1) |
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7.2 The power of the morphotron |
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112 | (1) |
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7.3 Source laws and consequence laws |
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113 | (3) |
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7.4 The Mendelian challenge |
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116 | (2) |
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7.5 The contemporary challenge |
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118 | (14) |
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7.5.1 The G matrix as predictor |
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119 | (1) |
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7.5.2 The challenge to gradualism |
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120 | (2) |
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7.5.3 The new genetics of adaptation |
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122 | (2) |
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124 | (2) |
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7.5.5 Molecular evolution: the case of codon usage bias |
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126 | (4) |
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7.5.6 The genomic challenge to adaptationism |
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130 | (2) |
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132 | (3) |
| 8 Climbing Mount Probable |
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135 | (30) |
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135 | (1) |
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8.2 Climbing Mount Probable |
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136 | (1) |
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8.3 One-step adaptive walks under mutation bias |
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137 | (3) |
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8.4 Extended adaptive walks under mutation bias |
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140 | (3) |
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8.5 Protein adaptation under mutation bias |
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143 | (2) |
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8.6 Origin-fixation dynamics |
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145 | (1) |
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8.7 The sushi conveyor and the buffet |
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146 | (3) |
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8.8 Why the theory of forces fails |
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149 | (3) |
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8.9 The sources and forms of biases |
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152 | (3) |
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8.10 Understanding developmental biases as evolutionary causes |
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155 | (2) |
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8.11 An interpretation of structuralism |
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157 | (2) |
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159 | (2) |
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8.13 Conditioning on mutational effects |
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161 | (1) |
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162 | (3) |
| 9 The revolt of the clay |
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165 | (32) |
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165 | (1) |
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9.2 A predictive model of protein sequence evolution |
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166 | (3) |
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9.3 Mutation-biased adaptation in the lab |
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169 | (7) |
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9.4 CpG mutational hotspots and altitude adaptation |
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176 | (1) |
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9.5 Transition bias in natural parallelisms |
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177 | (6) |
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9.6 Preferences for regulatory or structural changes |
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183 | (3) |
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186 | (2) |
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9.8 Evaluating the argument |
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188 | (6) |
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9.8.1 Cryptic fitness biases actually explain the data |
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188 | (1) |
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9.8.2 The connection to theory is thin |
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189 | (2) |
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9.8.3 Selection did all the hard work |
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191 | (1) |
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9.8.4 Mutation only affects the boring parts |
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192 | (2) |
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194 | (3) |
| 10 Moving on |
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197 | (20) |
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197 | (1) |
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10.2 Summary as historical narrative |
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197 | (4) |
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10.3 A synopsis of key points |
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201 | (2) |
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10.4 The objects and forms of explanations |
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203 | (3) |
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10.5 The importance of verbal theories of causation |
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206 | (4) |
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10.6 Discerning theories and traditions |
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210 | (4) |
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214 | (3) |
| Appendix A: Mutation exemplars |
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217 | (6) |
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217 | (1) |
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A.2 Error-prone repair of DNA damage |
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218 | (2) |
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A.3 A symbolic mutation process in a computer program |
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220 | (1) |
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A.4 Human-engineered mutations |
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221 | (2) |
| Appendix B: Counting the universe of mutations |
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223 | (8) |
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223 | (1) |
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B.2 A necessary simplification |
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224 | (1) |
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224 | (1) |
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225 | (1) |
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B.5 Inversions, deletions, and tandem duplications |
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226 | (1) |
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B.6 Transpositions (translocations) |
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226 | (1) |
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B.7 Lateral gene transfers |
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227 | (1) |
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228 | (1) |
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228 | (1) |
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229 | (2) |
| Appendix C: Randomness quotations |
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231 | (6) |
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231 | (1) |
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232 | (5) |
| Appendix D: Irrelevance quotations |
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237 | (6) |
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237 | (1) |
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237 | (6) |
| Bibliography |
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243 | (24) |
| Index |
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267 | |