BOOTING. 



51 



have the shanks feathered, on account of imperfect dominance of the heter- 

 ozygotes. Actually all have feathered feet. These statistics thus confirm the 

 view of the dominance of the inhibiting factor. Were clean shank recessive, 

 then the DR X R, crosses must give 50 per cent clean-footed and probably 

 over. The actual result, none clean-footed, is not in accord with the latter 

 assumption. 



Table 36. — Distribution of boot-grade in DRxD (non-booted) crosses. 



Pen 



No. 



653 

 653 

 653 

 653 

 653 

 653 

 653 

 653 

 653 

 653 

 653 

 653 

 653 

 653 

 653 

 653 

 653 

 653 



661 

 661 

 661 

 661 

 661 

 661 



Mother. 



No. 



508 

 508 

 577 

 577 

 587 

 587 

 635 

 635 

 652 

 652 

 691 

 705 

 705 

 713 

 713 

 760 

 760 

 799 



635 

 635 

 691 

 691 

 799 

 799 



Gen. 



Fi 

 Fi 

 Fi 

 Fi 

 Fi 

 Fi 

 Fi 

 Fi 

 Fi 

 Fi 

 Fi 

 Fi 

 Fi 

 Fi 

 F, 

 Fi 

 Fi 

 Fi 



Fi 

 Fi 

 Fi 

 Fi 

 Fi 

 Fi 



Races. 



Wh.Legh.XBf.Cooh.. 



....Do 



RXBf. Cooh 



...Do 



...Do 



...Do 



...Do 



...Do 



...Do 



...Do 



...Do 



...Do 



...Do 



...Do 



...Do 



...Do 



...Do 



...Do 



Grade. 



Pr. 

 Pr. 



3 



3 



1 



1 



3 



3 



5 



5 

 Pr. 



2 



2 

 Pr. 

 Pr. 

 Pr. 

 Pr. 



Father. 



No. 



117 

 116 

 117 

 116 

 117 

 116 

 117 

 116 

 117 

 116 

 117 

 117 

 116 

 117 

 116 

 117 

 116 

 117 



Gen. 



P. 

 P. 

 P. 

 P. 

 P. 

 P 

 P. 

 P. 

 P. 

 P 

 P. 

 P. 

 P. 

 P 

 P. 

 P. 

 P. 

 P. 



Race. 



Game. 



...Do. 



...Do. 



...Do. 



...Do. 



...Do. 



...Do. 



...Do. 



...Do. 



...Do. 



...Do. 



...Do. 



...Do. 



...Do., 



...Do., 



...Do., 



...Do., 



...Do., 



Grade. 



Total (143) . 



Bf. Coch.XGame. 



..Do 



..Do 



..Do 



..Do 



..Do 



Total (23) 



Grand total (166). 



Boot-grade in offspring. 



Present. 



34 



14 

 48 



Slight. 



42 







42 



Absent. 



9 

 76 



Per cent, 

 present. 



46.2 

 26.7 

 87.5 

 33.3 

 67.1 

 25.0 

 85.7 

 20.0 

 23.5 

 40.0 

 20.0 

 50.0 

 71.4 

 100.0 

 60.0 

 60.0 

 40.0 

 60.0 



46.9 



66.7 

 33.3 

 50.0 

 33.3 

 40.0 

 20.0 



39.1 

 45.8 



Table 37 . — Distribution of boot-grade in DR x RR (booted) crosses . 



* Pure-blooded Silkie assumed heterozygous in boot. 



Numerous observations have been made upon the progeny of parents 

 belonging to hybrid generations beyond the first. Owing to the extreme 

 imperfection of dominance it is rarely possible to say with certainty from 

 inspection whether a given bird has germ-cells dominant or recessive, or 



