xxiv LIST OF ILLUSTRATIONS 



FIGURE PAGE 



82. Pedigree Showing Heredity of Cataract 452 



83. Pedigree Showing Heredity of Albinism 454 



84. Pedigree Showing Heredity of Night-blindness . . . .455 



85. Pedigree of the Darwin-Galton-Wedgewood Family . . 457 



86. Pedigree Showing Heredity of Feeble-mindedness . . . 460 



87. Pedigree Showing Heredity of Feeble-mindedness . . . 460 



88. Diagram To Illustrate Galton's "Law of Filial Regres- 



sion" 472 



89. Diagram To Illustrate Galton's "Law of Ancestral Shares 



in Inheritance" 473 



go. Typical Fraternal Twins 477 



91. Typical Identical Twins 478 



92. Polygon of Variation 556 



93. Bimodal Polygon of Variation 559 



94. Correlation Table of Sixty-Day Oats 560 



95. Chromosomes of Drosophila melanogaster 562 



96. Diagram of Mitosis 564 



97. The Reduction Division 566 



98. Diagram of Chromatin Interchange 56S 



99. Diagram of Independent Segregation 569 



100. Diagram Showing Chromosome Relations in the Inheri- 

 tance of Sex 571 



