Apr. 24. i9i6 A Sex-Limited Color in Ayrshire Cattle 147 



Progeny of Bangora 29700 (black), BB: 



One red heifer by Marquis of Woodruff, bb. 

 One red heifer by College Marquis, Bb. 

 Two black heifers by College Marquis, Bb. 

 One black bull by Sir Croft of Spring City, Bb. 

 One black bull by Johanna Croft King, Bb. 

 One black heifer by Melrose Good Gift, BB. 

 One black bull by Melrose Good Gift, BB. 

 One red heifer by Cavalier's College Master, bb. 



Progeny of Bangora 2d (black), BB (daughter of Bangora by College Marquis): 

 One black bull by Johanna Croft King, Bb. 

 Two black heifers by Melrose Good Gift, BB. 



Progeny of Bangora 's Melrose (black), BB (daughter of Bangora by Melrose Good 

 Gift, BB): 

 One red heifer by Cavalier's College Master, bb. 



CONCLUSIONS 



(i) Black-and-white color is a simple allelomorph of red-and-white 

 color in Ayrshire cattle. 



(2) In the male the black-and-white character is dominant and in the 

 female the red-and-white character is dominant. 



(3) Males heterozygous for the two characters are black-and-white, 

 while females heterozygous for the two characters are red-and-white. 



LITERATURE CITED 



(i) Arkell, T. R., and Davenport, C. B. 



1912. Horns in sheep as a typical sex-limited character. In Science, n. s. v. 

 35, no. 897, p. 375-377- 



(2) Gerould, J. H. 



1911. The inheritance of polymorphism and sex in Colias philodice. In Amer. 



Nat., V. 45, no. 533, p. 257-283, 5 fig. References to literature, p. 283. 



(3) Jacobson, Edward. 



1909. Beobachtungen tiber den Polymorphismus von Papilio memnon L. In 



Tijdschr. Ent., deel 52, afl. 3/4, p. 125-157, 2 fig., tab. 



(4) KUHLMAN, A. H. 



1915. Black and white Ayrshires. In Jour. Heredity, v. 6, uo. 7, p. 314-322, 

 illus. 



(5) MeijERE, J. C. H. de. 



19 10. tJber Jacobsons Ziichtungsversuche beziiglich des Polymorphismus von 



Papilio Memnon L. 9 und iiber die Vererbung sekundarer Ge- 

 schlechtsmerkmale. In Ztschr. Indukt. Abst. u. Vererbimgslehre, 

 Bd. 3, Heft 3, p. 161-181, pi. 3. 



(6) Wentworth, E. N. 



1912. Another sex-liraited character. In Science, n. s. v. 35, no. 913, p. 986. 



(7) Wood, T. B. 



1905. Note on the inheritance of horns and face colour in sheep. In Jour. Agr. 

 Sci., V. I, pt. 3, p. 364-365, pi. 4. 



