TABLES. 



43 



Table 22. — Grade distribulion of the Fi young produced by the cross of "tchite" 



v'ith "dark" Dutch. 



Table 23. — Grade distribution of the Fi young produced by the cross of "white" xcilh 



heterozygosis "dark" Dutch. 



Parents. 



Grades of young. 



4 5 6 7 8 9 10 11 12 13 14 15 16 17 



Totals. 



Means, 



lower 



group. 



Means, 

 higher 

 group. 



rf'6175(17) X 9 5158(5). 



X 9 5940(5). 



X 9 5920(6). 



X 9 5601(6). 



X 9 5939(6). 



X 9 6570(6). 



X 9 6643(7). 



X 9 6891(7). 



X 9 6031(8). 



X 97118(8). 



cf 7007(14) X 9 5158(5). 



X 9 5940(5). 



X 9 5601(6). 



X 9 5920(6). 



X 9 5645(6). 



X 9 6570(6). 



10 



11 



6 



5 



5 



12 



14 



16 



15 



6 



5 



5 



3 



4 



•7.25 



14.72 



Totals. 



13 



13 



15 



2 2 



8 18 



24 



12 



130 



7.04 



15.56 



Table 24.- — Grade distribution of the young prodv/:ed by a cross of tan Dutch with 

 seJf anituals heterozygous for tan. 



