II 



MEIOSIS IN THE FEMALE 



6i 



germinal vesicles with diffuse chromosomes are to be found, and it is 

 evident that the bivalents resulting from syndesis condense continuously 



B 



-=?'?<. ••.■■7 V 



/■ '■■■ i •• . • .• • ■ /; ■■:'■ '•J%u^ : ■ -X 

 I: yf i^'i.} ■■■:■■ ■^i:'%^--:'^-,x^C r\ 







xJZ' 



G 





^^v 



Fig. 25. 



The chromosomes during the oogenesis of Diaplomus castor from the pachytene stage (A), tlirough the 

 germinal vesicle stage (B-E) to the condensation of the definitive bivalents (F). (Matschek, A./C., 1910.) 



into the definitive bivalents of metaphase I. Animals, however, which 

 are carrying egg-sacs contain in their oviducts oocytes with well-developed 

 germinal vesicles with diffuse chromosomes. Hacker suggests that in 



