EFFECT OF FAMOUS ANCESTORS 67 



random sample bulls, random sample cows). Have each group 

 sorted in order of the herd book number of the ancestor, tabulate 

 the frequency of the appearance of the different ancestors in each 

 group ; arrange in order of the frequency of appearance. Pages 68-72 

 give form tables to summarize most frequent ancestors. What do 

 you conclude as to the ancestors found in the different groups of 

 pedigrees? Are they different or are they the same? Do you note 

 any significant difference between the four groups? Would the 

 appearance of the most frequently appearing animal in the 

 Advanced Registry group indicate the probable worth of any un- 

 known animal? What would you consider the great families of 

 the breed? 



After reading the following references write a short paper on this 

 subject emphasizing especially its possible importance to produc- 

 tion. Define family and write of interesting facts connected with 

 each for the breeds you have studied. Critically review the data 

 given in these references. 



REFERENCES 



M. S., chapters II and VII. 



Hunt, R. E. 1921. Who's who among Holstein-Friesian sires, Va. Agr. Col. 

 Ext. Bui. 66, pp. 14. 



Hoven, J. M. 1916. Finding the prepotent sire, Jour. Heredity, vol. 7, pp. 

 173-178. 



Prescott, M. L., and W. A. 1923. Holstein-Friesian Foundations, Holstein- 

 Friesian World, Inc., Syracuse, New York. 



Maine Station Bui., 281, 300, and 301. 



