Iol. 
LIST OF ILLUSTRATIONS 
. DIAGRAM ILLUSTRATING COMPLEMENTARY FACTORS . 
. DIAGRAM ILLUSTRATING BEHAVIOR OF INHIBITORY FACTOR . 
. Dracram SHOWING SomE PossIBLE COMBINATIONS IN F, WHEN 
F, oF FIGURE 80 Is INBRED 
. DIAGRAM SHOWING THE HETEROZYGOTE SITUATION 3 
. DiacGRAM ILLUSTRATING THE ACTION OF A SUPPLEMENTARY 
Factor 
. DIAGRAM wane ssa Ss is ieenae OF THE 
15:1 Ratio In F, oF HYBRID BETWEEN RED- AND WHITE- 
GRAINED WHEAT 
. ANOTHER METHOD OF Veviiainto NeesdoNcEuEe’ $s 15:1 Ratio 
. DracraM OF NILSSON-EHLE’S 63:1 RATIO . - 
. SEX-LINKED INHERITANCE OF WHITE AND RED Eves IN ‘rie: 
phila. 
. RECIPROCAL Cross TO 1 Tet SHOWN IN FIGURE 87 
. DRAWING SHOWING THE Four Pairs OF CHROMOSOMES SEEN IN 
THE Divivinc Ecc oF Drosophila. 
. DIAGRAM SHOWING THE LOCATION IN THE Four Bina ners 
soMES OF Drosophila, oF THE GENES FOR VARIOUS MENDELIZ- 
ING CHARACTERS, AS DETERMINED BY MorGAN. 
. SEX-LINKED INHERITANCE OF BARRED AND UNBARRED (Brack) 
PLUMAGE IN POULTRY . 
. RECIPROCAL Cross TO THAT — IN — QI 
. D1aGRAM TO SHOW THE MECHANISM OF CROSSING OVER. 
. AN ARMADILLO Ecc aBout Srx WEEKS AFTER FERTILIZATION, 
SHOWING THE QUADRUPLET FOETUSES 
. A Typrcat OppositE-SEXED Parr OF CATTLE TwINs. 
. A PepicREE oF BRACHYDACTYLISM . ea. 
. A PEDIGREE SHOWING TRANSMISSION OF CATARACT . 
. A PEDIGREE SHOWING HEREDITY OF FEEBLE-MINDEDNESS . 
. ANOTHER PEDIGREE SHOWING HEREDITY OF FEEBLE-MINDED- 
NESS . 
. PEDIGREE SHOWING aeMena® oF INSANITY 
PEDIGREE SHOWING HEREDITY OF INSANITY AND NEUROTIC 
TENDENCY . .. . 
