Inheritance of Multiple Alleles in Autosomes 



91 



Fig. 30. T3'pes of horns in sheep, (a) Merino rams showing typical 

 horns of the Merino-Rambouillet type, (b) A Rambouillet ram homo- 

 zj^goiis for hornless, (c) A "horned" Rambouillet ewe with wool clipped to 

 show the knobs which sometimes break through the skin to form scurs. 

 (d) Hornless ewe with depressions instead of knobs or scurs. (e) A Dorset 

 ram. (/) A Dorset ewe. Genotypes are: (a), hh; (b), HH; (c), hh; 

 id), HH or Hh; (e) and (/), H'H'. (Figures (a) through (d) courtesy of 

 Dr. B. L. Warwick; (e) and (/) from J. F. Abernathy, Chicago. From 

 Warwick and Dunkle in the Journal of Heredity.) 



