232 Heredity and Environment 



stration that the hereditary characteristics of the transplanted ova 

 are in no wise changed by the foster mother. They removed the 

 ovary from a pure black guinea-pig and put it in the place of the 



FIG. 86. EFFECT OF TRANSPLANTING OVARIES IN GUINEA-PIGS. Above, 

 young black female; in the middle, mature white female; below, mature 

 white male. The white female's ovary was removed and in its place was 

 put the ovary from the black female. The white female (with "black" 

 ovary) was then bred to the white male. (From Castle.) 



