Mendel' s Principles of Heredity 543 



It will be of interest to compare how the Mendelian expec- 

 tations agree with the results of actual experiments. The 

 following tables are taken from Mr. C. C. Hurst's " Experi- 

 mental Studies on Heredity in Rabbits " (Jouvn. Linn. Soc. 

 Zool., xxix., pp. 283-324). 



Table 1. 



Giving the results of separate litters produced by crossing 

 hybrid short-haired rabbits with pure long-haired Angoras. 

 H = hybrid ; A = Angora. The numbers after the letters 

 identify the rabbits used in the experiments. The doe is 

 placed first in each case. 



H5 x A2 produced 



H5 x A2 



H7 x A2 



H8 x A2 



H8 x A2 



A3 x Hio 



A3 x H12 



Short Angora 



3 2 



Total 



The Mendelian expectation is 19 shorts and 19 Angoras. 



Table 2. 



Giving particulars of crossing hybrids bred from pure 

 Angoras and pure short-haired rabbits. 



Short Angora 



H5 x Hi 2 produced 





5 



2 



H5 x Hio 







1 



H7 x Hio 





2 





H7 x Hio 





2 





H7 x Hio 





4 



1 



H8 x Hio 









H8 x Hio 





1 





H9 x Hio ,, 





7 



1 



H9 x Hio 





5 



2 



H9 x Hio 





2 





H9 x Hio 





4 



0 



H9 x Hio s , 





6 





Hnx H12 





5 



2 



Hn x H12 





6 



2 



H12X Hio 





2 



0 





Total ... 



53 



17 



