In Pursuit of the Gene

ics; evolution; gemmules; genes;
hybridization; Mendelism; pangenes;
variation
heritability, measure of, 298–299n49. See
also acquired traits
Hertwig, Oscar, 147–149, 150, 154
Hertwig, Richard, 147, 153
Hieracium: Mendel’s study of, 97, 98–99,
100, 112; reason for atypical behavior
of, 307n50
Histoire de science et des savants depuis deux
siècles (De Candolle), 26–29, 30
History of Genetics (Sturtevant), 185–186,
188, 193
Hitler, Adolf, 254, 270
homozygosity, 329n45
Hooker, Joseph Dalton, 1, 2, 30, 33, 54,
71
Hopkins, William, 7, 8
horses, coat color inheritance in, 132–
133, 135–140, 141–142, 191, 326n18
human genome, sequencing of, 205,
282, 285–286, 287–289, 290
Huntington’s disease, genes for, 284
Hurst, Charles Chamberlain, 133–140,
141, 142–143, 191, 313n42
Huxley, Julian, 209, 221, 267, 268, 271,
272, 274
Huxley, Thomas, 2, 30, 209
hybridization: backcross in, 306n35; fertility
vs. infertility and, 90–91;
Mendel’s experiments in, 91–100,
106, 110–111, 306n35. See also insects;
Mendelism; Mendel’s laws; mice;
plants; names of hybridized species
“Hybridization in a Mutating Period in
Drosophila” (Morgan), 179
“Hybridizing of Monstrosities” (De
Vries), 84
idiochromosome theory, in sex determination,
168–171
idioplasm, 100. See also gemmules;
germ-plasm; pangenes
inbreeding, 201, 343n73
independent assortment: Bateson and,
114; Boveri and, 182; Correns and,
329–330n49; Mendel’s law of, 94–
96, 98, 163, 183. See also hybridization;
Mendelism; Mendel’s laws
Indiana University, 273, 278
inheritance. See acquired traits; heredity;
heritability; hybridization
insects, studies of chromosomes in,
156–159, 168, 175. See also names of
insects
intelligence. See mental aptitude
interference, in double crossovers,
327n29
International HapMap Project, 288–289,
290
intersexes, Bridges’s discovery of,
345n112
Intracellular Pangenesis (De Vries), 72–78
intravarietal crossing, theory of, 263,
264, 343n73
Jacobs, Jessie. See Muller, Jessie Jacobs
Janssens, Frans-Alfons, 182–183
Johannsen, Wilhelm, 200–201, 230,
329nn44,46
Kantorowicz, Thea. See Muller, Thea
Kantorowicz
INDEX © 361