330 



INTRODUCTION TO CYTOLOGY 



r t 



S+oindcircl 



Recip. Transl. 



il 



Semi-sfenle 



Somot 



C. 50°/o alternoil-e dis+nbuhon, giving 

 gameVes of Z +ypes , bol-h viable 







Did kinesis 



Selling gives 3 types 



C. 50% adjacent distriloution giving 

 gwmetes of 4 types, all non-viable 



t f 



Standard 



t t 



II 



■ • 



Modified type 



t t 



Standard 



/ \ 



/ \ 



/ \ 



/ \ 



t t 





Standard 



\ 



Semi-sfenle 



% 

 t 



) 



Sem'i- sterile 



t f 



II 



I • 

 ■ • 

 I I 



Modified type 



Fig. 187. — Diagram of reciprocal translocation and its results in the " semisterile-2 " 

 strain of Zea Mays, based on data of Burnham (1930) and McClintock (1930a6). Chromo- 

 some VIII represented by solid line and chromosome IX by broken line. For simplicity 

 the two chromatids of each chromosome are not shown. The rectangles represent the 

 plants, and the circles their (spores and) gametes. Further explanation in text. 



