In Pursuit of the Gene

366 ¨ INDEX
Oenothera (continued)
atypical behavior of, 213–217, 273;
mutation theory and, 227, 273,
333n24; nonequivalence of sexes in
crosses of, 309n15, 332n21; origin
of, 217–219
Offermann, Carlos, 247–248, 249, 256–
257, 259
O’Grady, Marcella, 155
“On a Generalized Theory of Alternative
Inheritance” (Pearson), 131
“On Blood-relationship” (Galton), 20,
23
“On Heredity” (Weismann), 73–74,
150–151
On the Formation of Vegetable Mould through
the Actions of Worms (Darwin), 72
“On the Generation of Animals” (Aristotle),
3
“On the Law of Ancestral Heredity”
(Pearson), 63, 65
On the Movements and Habits of Climbing
Plants (Darwin), 70
On the Origin of Species (Darwin), 1, 3, 4,
69, 130
“On Twin Hybrids” (De Vries), 214
oöcytes, 169
Osborne, Henry Fairfield, 232
Out of the Night (Muller), 249, 267, 272
Painter, Theophilus Shickel, 226, 244,
245, 249, 264, 283, 342n54
pangenes: De Vries and, 73, 74–75, 78–
79, 81, 82–84, 113, 213–214; Mendelism
and, 108, 113. See also anlag;
gemmules; germ-plasm; idioplasm
pangenesis: Darwin’s theory of, 1–4, 11,
69, 72–74, 110; De Vries’s revised
theory of, 72–85, 110; Galton-
Darwin experiment on, 12–21
parasynthesis, 318n48
particulate theory of inheritance. See
gemmules; pangenes
Pascal’s triangle, 302–303n19, 303n21
Patterson, John Thompson, 226
Pauling, Linus, 279, 280, 281
Pauling, Peter, 281
PCR (polymerase chain reaction), 285
Pearson, Karl: horse coat color problem
and, 132–133, 134–135, 136, 138,
141; on mouse hybridization experiment,
312n16; as publisher of
Biometrika journal, 114, 115, 116; and
revision of Galton’s ancestral law,
63, 65, 115, 117; and use of biometrics
in evolution study, 46–47,
58, 60, 117, 127, 131–132; as Weldon’s
close friend, 46, 116, 140, 142
peas, Mendel’s study of inheritance in,
33–34, 92–97, 98, 99, 106, 107, 108,
112, 311n13
Perkins, William, 315n12
Phylloxera, 171–172, 174, 175, 176
Physical Basis of Inheritance, The (Morgan),
186–187
pink (Drosophila mutation), 202, 203,
330n51
plants: De Vries’s mutant hybrids of,
74–76, 78–79, 83–84; Gaertner’s
book on, 90–91; Galton’s studies of
inheritance in, 33–37, 41; regenerative
capabilities of, 74; statistical