NOSTRIL-FORM. 61 



Table 48 . Distribution of frequency of grades of "openness" in offspring when both parents are heterozygous (DR x DR) . 



Table 49. Distribution of frequency of grades nf " openness " in offspriruj when both parents are heterozygous 



(DRxDR, Fj and later generations). 



Serial Pen 

 No. No. 



34 

 35 

 36 

 37 

 38 

 39 

 40 

 41 

 42 

 43 

 44 

 45 

 46 

 47 

 48 

 49 

 50 

 51 

 52 

 53 

 54 

 55 

 56 

 57 

 58 

 59 

 61 



Mother. 



Father. 



763 

 765 

 765 

 802 

 802 

 802 

 802 

 812 

 812 

 812 

 812 

 812 

 763 

 812 

 812 

 765 

 802 

 825 

 728 

 703 

 825 

 825 

 825 

 825 

 825 

 728 

 763 



No. Gen. 



3799 Fj 

 84 Fi 



984 ! Fj 

 4013 ; Fj 

 39.54 1 Fs 

 4038 Fj 

 4164 I F3 

 84 Fi 



913 F, 

 4728, Fj 

 5120 ! Fj 

 5540 , Fj 

 2250 I F2 

 4726 F, 

 4735 

 1790 

 4012 

 2198 

 2271 

 2700 



350 

 4708 

 5019 

 5035 

 5672 

 2248 



377 



Races. 



Hou.XWh.L 



.Do 



Do 



PolishXMin.. 



...Do 



...Do 



...Do.. 



Hou.XWh.L. 



...Do 



...Do.. 



...Do 



PolishXMin.. 

 Hou.XWh.L. 



.Do 



.Do 



.Do 



PolishXMin.. 



.Do 



Hou.XWh.L. 



...Do 



Polifh X Min. . 



...Do 



...Do 



...Do 



...Do 



Hou. XWh.L. 

 ...Do 



Races. 



Hou.XWh.L. 



....Do 



...Do 



PolishXMin.. 

 ....Do 



...Do 



....Do 



Hou.XWh.L. 



....Do 



....Do 



.. .Do 



Do 



....Do 



PolishXMin.. 



....Do 



Hou.XWh.L. 

 PolishXMin.. 



....Do 



Hou.XWh.L. 



...Do 



PolishXMin.. 



....Do 



....Do.. 



....Do 



...Do 



Hou.XWh.L. 

 ....Do 



Grade of openness in oflFspring. 





Totals (663) . 

 Percentages . . 



53 

 117.424.719.2 8.0 



39 10 



5.9! 1.5 



8 I 9 



10 



8 

 2.7 



39 57 41 

 S.9 8.6 6.2 



30.7 



These earlier data were not even roughly quantitative, and it is the 

 quantitative data that first give the key to the true relations. However, 

 sufficient evidence for the change in the conclusion is certainly due. The 



