216 



GENETICS 



(2) The English Currant-worm 



A famous case of sex-limited inheritance is that of 

 the English currant- worm, Abraxas, which occurs in 

 two varieties, viz., Abraxas grossulariata and Abraxas 



FIG. 66. Abraxas grossulariata, the English currant-moth, and (on the 

 right) its paler lacticolor variety. From Punnett's " Mendelism." 



lacticolor (Fig. 66). The lighter-colored lacticolor 

 is recessive to the darker-colored grossulariata variety 

 and has been found in nature associated only with the 

 female sex. 



