III. 8d 



III. 9 



IV. DEVELOPMENT AND GENETICS 

 KEY 



1 Theoretical problems and general questions 



2 General investigations 

 General subjects 

 Poly- and heteroploidy 

 Hybridization 

 Chimaerae and mosaics 



Merogony, including gyno- and androgenesis 

 Nuclear transplantation studies 

 Karyological studies 

 Genetical basis of sex 



3 Effects of genetical factors 



a Specific genes and mutants 

 b Lethal factors 

 c Phenocopies 



4 Methods and techniques 



237 



