Inheritance of Characteristics in Domestic Fowl

by Charles Davenport

• Introduction
• Chapter I. The Split or Y Comb

  A. Interpretation of the Y Comb

  B. Variability of the Y Comb and Inheritance of the Variations

• Chapter II. Polydactylism

  A. Types of Polydactylism

  B. Results of Hybridization

• Chapter III. Syndactylism

  A. Statement of Problem

  B. Results of Hybridization

• Chapter IV. Rumplessness
• Chapter V. Winglessness
• Chapter VI. Booting

  A. Types of Booting

  B. Normal Variability

  C. Results of Hybridization

• Chapter VII. Nostril-form
• Chapter VIII. Crest
• Chapter IX. Comp-lop
• Chapter X. Plumage Color

  A. The Gametic Composition of the Various Races 71

  1. White
  2. Black
  3. Buff

  B. Evidence

  1. Silkie × Minorca (or Spanish)
  2. Silkie × White Leghorn
  3. Silkie × Buff Cochin
  4. White Leghorn × Black Minorca
  5. White Leghorn × Buff Cochin
  6. Black Cochin × Buff Cochin

• Chapter XI. Inheritance of Blue Color, Spangling, and Barring

  A. Blue Color

  B. Spangling

  C. Barring

  1. White Cochin × Tosa
  2. White Leghorn Bantam × Dark Brahma
  3. White Leghorn Bantam × Black Cochin

• Chapter XII. General Discussion

  A. Relation of Heredity and Ontogeny

  B. Dominance and Recessiveness

  C. Potency

  D. Reversion and the Factor Hypothesis

  E. The Limits of Selection

  1. Increasing the Red in the Dark Brahma X Minorca Cross
  2. Production of a Buff Race by Selection

  F. Non-inheritable Characters

  G. The Role of Hybridization in Evolution