DILUTION EFFECTS IN CERTAIN EYE COLORS 443 



The daughters were indistinguishable from the sons in eye 

 color. 



Pink heterozygous for white 



Pink daughters heterozygous for white were obtained in Fi by 

 mating white pink females to pink males. The Fi females were 

 white. In order to get pink males for comparison in the same 

 cross which gave the desired females we continued the experi- 

 ment to the F2 generation. The eye color of the pink was not 

 lighter, although heterozygous for white. 



p white pink 9 Xwp — Xwp 

 pink cf X W p p 



Pink heterozygous for eosin and vermilion 



When pink females are mated to eosin vermilion pink males 

 the daughters are hke the sons and like stock pink females. A 

 back cross between the Fi females and eosin vermilion pink males 

 was made to get material for further study. The results show 

 the degree of linkage between eosin and vermilion. 



