Importance of heredity, 76.—Alternating and mid-parental
heredity, 77.—Heredity in race-mixture,
78.—Intra-racial heredity, 80.—Regression to ancestral
types, 81.—Similarity of brothers and sisters,
83.—Mendelian inheritance, 84.
Origin of local types, 84.—Descent in large and in small
communities, 84.—Johannsen’s observations on plants,
89.—Mixture of local types, 90.—Variability in local
types and in races, 91.