The Genetic and the operative evidence relating to secondary sexual characters
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THE GENETIC AND THE OPERATIVE EVIDENCE RELATING TO SECONDARY SEXUAL CHARACTERS
CONTENTS.
THE GENETIC AND THE OPERATIVE EVIDENCE RELATING TO SECONDARY SEXUAL CHARACTERS.
PART I.
CASTRATION OF SEBRIGHTS.
A MALE SEBRIGHT THAT DID NOT BECOME COCK-FEATHERED AFTER CASTRATION.
TRANSITIONAL FEATHERS.
CASTRATION OF F₁ HEN-FEATHERED MALES FROM SEBRIGHT BY GAME.
CASTRATION OF F₂ HEN-FEATHERED MALES.
HEWITT’S SEBRIGHT HEN THAT BECAME COCK-FEATHERED IN OLD AGE.
HEREDITY OF HEN-FEATHERING.
HEREDITY OF COLOR IN THE CROSS BETWEEN SEBRIGHT AND BLACK-BREASTED GAME BANTAM.
A. The F₁ Birds.
B. Description of F₂ Birds.
D. The Number of Color Factors Involved.
E. Back-Cross of F₁ ♀ to Sebright ♂.
F. Review of the Heredity of the Color of the Plumage of Poultry.
ENDOCRINE CELLS IN OVARY AND TESTES OF BIRDS.
LUTEAL-CELLS IN THE TESTES OF THE MALE SEBRIGHT.
ENDOCRINE CELLS IN THE TESTES OF MAMMALS.
CYCLICAL CHANGES IN THE INTERSTITIAL CELLS IN HIBERNATING MAMMALS.
HERMAPHRODITISM IN POULTRY AND THE SECONDARY SEXUAL CHARACTERS.
PART II.
DARWIN’S THEORY OF SEXUAL SELECTION.
OTHER THEORIES TO ACCOUNT FOR SECONDARY SEXUAL CHARACTERS.
DISPLAY OF THE MALE.
PART III. THE GENETIC AND THE OPERATIVE EVIDENCE.
A. Evidence from Mammals.
B. Evidence from Birds.
C. Evidence from Amphibia.
D. Evidence from Crustaceans.
E. Evidence from Insects.
PART IV. SUMMARY AND CONCLUSIONS.
BIBLIOGRAPHY.
DESCRIPTION OF PLATES.
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