RESULTS OF HYBRIDIZING RING-DOVES. 



305 



TABLE IX. 



BLOND HYBRID MALE (TABLE V.) X BLOND FEMALES. MATING 31. 

 Offspring 5 blonds: i male, 3 females, i sex ?. 

 B.cf B. 9 



I 



! 



r 



B.cf B.9 W. 9 



B.tf 1 



-x- 



B.9 



x- 



B.c? 



W. 9 



B.9 



B.9 (Original Stock.) 



TABLE X. 



WHITE HYBRID MALE (TABLE VII.) X BLOND FEMALES. MATING 12. 



Offspring 6 blonds: sex ?. 

 I white: sex ?. 



B. W. 



x- 



W.c? 



W. 9 



B.rf 1 



B.9 



W. 9 



X 



W.c? 



B.9 



B.9 



(Original Stock.) 



nestling down already described on pp. 296-8. These characters 

 and doubtless others not noticed act as a group, and they appear 

 in female birds of the FI hybrid generation when the male bird 

 possesses them. The characters of the blond bird come very 

 near being sex-linked as they appear in only a few female 

 hybrids. 



There are many interesting points of resemblance between the 

 results of these experiments and those obtained by some other 

 workers. Apparently all of the cases of sex-linked inheritance 

 in birds involve similar phenomena. Strikingly similar results 



