DILUTION EFFECTS IN CERTAIN EYE COLORS 455 



White-eosin compound pink heterozygous for vermilion 



When white pink females are mated to eosin vermiHon pink 

 males the daughters are white-eosin compound pink heterozy- 

 gous for vermihon. These females are slightly lighter than the 

 white-eosin compound pink females or the eosin pink males, be- 

 cause of further dilution due to heterozygosity for vermilion. 

 No male can be made to correspond to this color since the male 

 has but one chromosome and cannot be made heterozygous, in 

 the same sense, i.e., he must always be haploid for V, and as 

 we have seen, a haploid V in the male is equivalent in color to 

 VV in the female. The analysis is as follows : 



*In addition there appeared in Culture I one light male (sterile), in Culture 

 III one white female, in Culture IV one white female and one light male (sterile), 

 in Culture V one white female, in VII two white females, and in VIII four white 

 females. 



The dilution of the white-eosin compound pink heterozygous 

 for vermilion can be directly observed in the offspring of an eosin 

 pink female by white vermilion pink male, namely eosin pink 

 sons and the above daughters: 



Pi 



