80 



THEORY OF EVOLUTION 



(fig. "42) gives lacticolor daughters and gros- 

 sulariata sons and these inbred give grossu- 

 lariata males and females and lacticolor males 

 and females. 



&RC5SULARIATA 9 



v3 --rfi^jO 



o© 



EGGS O © 



LACTICOLOR d' 



^>»- 



o® 



ECC5 Of F. 



o® 







® ® 



® SPERM 



®® '-^S^ 



®® 



%4i^^^l^ 





Fig. 41. Sex-linked inheritance in the wild moth. Abraxas 

 grossulariata (darker) and A. lacticolor. 



