12 AN INTRODUCTION TO MODERN GENETICS 



CHAPTER PAGE 



VII. The Interaction of Genes — continued 



6. The genotypic milieu 163 



7. Dosage relations of genes 163 



8. Dosage compensation 166 



9. Multiple allelomorphs 168 

 10. Dosage in polyploids and polysemies 169 



VIII. Gene Controlled Processes 173 



1. Quantity of effect and rate of production 173 



2. Genetic control of the kind of substance produced 175 



3. Time-effect and dose-effect curves 180 



4. Dominance 185 



5. Mimic genes 186 



6. Plus-minus variations in gene effect 187 



7. The variability of gene effects 188 



IX. The Genetic Control of Pattern 192 



1. The nature of developmental patterns 192 



2. Genes affecting the manifestation of patterns 193 



3. Genes which affect the pattern 



(a) Disruption of the pattern 201 



(6) Reorganization of the pattern 203 



X Sex Determination 207 



A. GAMETE SEXUALITY 208 



B. GAMOPHASE AND ZYGOPHASE SEXUALITY 212 



1. Bisexual gamophase 213 



2. Separately sexed gamophase 213 



C. ZYGOPHASE SEXUALITY 215 



1. Lymantria 216 



2. Drosophila 219 



