ISC, 



PHYSIOLOGICAL GENETICS 



exception of a transplant into a ca-host , which becomes claret. 

 There is finally another case, in which the transplant changes 

 the host: a cinnabar eye disk transplanted into a host that is 

 simultaneously apricot and vermilion makes the host's eye 



Fig. 34. — Diagrammatic representation of the first series of results of eye 

 transplantation in Drosophila. Shaded circles, autonomous development of 

 pigmentation of the implant; black, nonautonomous; half shaded, intermediate 

 color. {From Beadle and Ephrussi, 1936, Genet. 21.) 



apricot. Thus, we have "hormonic" influences from host to 

 implanted eye and from implanted eye to host's eye in certain 

 cases. The first influence, however, did not originate in the gonad 

 (as in the cases reported before) but in the fat body and Mal- 

 pighian tubules. 



From these results the authors conclude: Since the pigmenta- 

 tion of a genetically p-eye can be modified to v + (Wild type) by 



