SEGREGATION OF HOMOLOGOUS CHROMOSOMES 



461 



ber of Stenobothrus rings in form A would be compensated for 

 by a smaller number of J's, or heteromorphic forms and the small- 

 er number of Stenobothrus rings in form B by a larger number 

 of J's. This might have indicated that one form was more viable 

 in a given environment than the other. What we have is a uni- 

 form decrease in both Stenobothrus rings and J's in form B 

 and a compensatory increase in the number of telomitic tetrads. 

 The most important point to be noted is that if we may assume 

 that heteromorphism is an indication of heterozygosity, then form 



JOURNAL OF MORPHOLOGY, VOL. 28, NO. 2 



