122 HEREDITY [CH. 



found wild almost solely in females. When mated 

 with a typical (grossulariatd) male all the offspring 

 of both sexes are typical, i.e. the type is completely 

 dominant over the variety lacticolor. When two such 

 heterozygous individuals are paired together, lacticolor 

 appears as would be expected in about one quarter 

 of the offspring, but all the lacticolor specimens are 

 females. When a lacticolor female is mated with a 

 heterozygous male, half the males and half the females 



Fig. 13. Abraxas grossulariata and its var. lacticolor. 



are lacticolor, that is to say, by this mating alone can 

 the lacticolor character be transferred to the male sex. 

 Lact. male x lact. female gives only lact. in both sexes, 

 as would be expected from two recessives paired to- 

 gether, but lact. male by heterozygous female gives all 

 the females lact., all the males typical (heterozygous) 

 grossulariata. Using the abbreviations L for variety 

 lacticolor, G for the typical grossulariata character, 

 G (L) for heterozygous grossulariata, </ for male, 



