Fig 14 — Diacrams to show terminalization of two chiasmata 

 "in a bivalent with quasi-terminal spindle attachments. 

 a the bivalent at early diplotene when the chiasmata 

 correspond in position to the points of crossmg-oyer ; 

 b at late diplotene ; c, at diakinesis when terminaliza- 

 tion is completed. The hollow arrows represent the force 

 of repulsion inside the loop, the soHd arrows the direction 

 in which the chiasmata are moving. 



