Contents  
  Front Matter
  I Mendelian Segregation and the Chromosomes
  II Types of Mendelian Heredity
  III Linkage
  IV Sex Inheritance
  V The Chromosomes as Bearers of Hereditary Material
  VI The Correspondence Between the Distribution of the Chromosomes and of the Genetic Factors
  VII Multiple Allelomorphs
  VIII Multiple Factors
  IX The Factorial Hypothesis
  Appendix - Methods of Breeding Drosophila
  Bibliography
  Index