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ANNALS NEW YORE ACADEMY OF SCIENCES 



Table I 



Distribution of Booting in F 2 and F l . 



Mating 

 No. 



A 



B 



c 



D 



E 







Absent 



Total 



Remarks 



3 



1 



7 



1 



14 



6 



29 



Y x females from 1XF, 



















male from 2. 



4a 







10 



2 



8 



3 



4 



27 



Y 1 females from 2 X litter 

 brother. 



Ab 







6 



3 



4 



5 



3 



21 



Fj females from 2 X re- 

 ciprocal litter brother. 



5 



















2 



6 



8 



Fj females from 2 X Rock 

 male. 



6 







7 



10 



11 



2 







30 



Fj females from 1 X Lang- 

 shan male. 



7 















o 



4 



o 



10 



Female Hocks X male 

 from 1. 



8 



3 



13 



4 



10 







• 



30 



Female Langshans X 

 male from 1. 



Table II 







Expectation 



Observed 













Mating 

 No. 



Gener- 

 ation 



Per 

 cent 



Based on total 

 recorded 







Total 



Remarks 







clean 















Clean 



Booted 



Clean 



Booted 



1 



Fi 











all 



2 4 



24 



26 



Langshan females X Rock 

 male. 



2 



Fx 











all 







32 



32 



Rock females X Langshan 

 male. 



3 



F 2 



18.75 



5.4 



23.6 



6 



23 



29 



Females from 1 X male 

 from 2. 



4a & b 



F 2 



12.5 



6. 



42. 



7 



41 



48 



Females from 2 X males 

 from both 1 and 2. 



5 



Fx-5 



50 



4. 



4. 



6 



2 



8 



Females from 2 X Rock 

 male. 



6 



Fi-5 











all 







30 



30 



Females from 1 X Lang- 

 shan male. 



7 



F 15 



37.5 



3.75 



6.25 



3 



7 



10 



Female Rocks, male from 



1. 

 Female Langshans, male 



8 



F,-, 











all 







30 



30 



















from 1. 



The results are in entire agreement with Davenport's and confirm his 

 theory of an inhibitor. The back matings suggest that the amount of 

 boot varies with the increase or decrease in the amount of booted "blood". 

 There are, however, one or two other theoretical ways of accounting for 

 the observed facts. If we assume that booting is common to both Lang- 

 shans and Rocks and is recessive to a pair of complementary factors, both 



4 See above in text. 



