S+pR 



S+pC 



Fig. 



Figs, go and 91. — End of pachytene and metaphase configurations 

 of a pair of chromosomes differing in respect of a single inversion. 

 S, single crossing-over in the inversion ; R, reciprocal, C, 

 complementary and, D, disparate crossing-over in the inversion. 

 d and p, crossing-over distal and proximal to the inversion. One 

 chromosome broken, the other entire except for breaks at point 

 of inversion. 



