Fig. 25. — Diagram to show formation of polar bodies in egg: i, early germ- 

 cell, o(j<^onium, with whole number of chromosomes — paternal, black dots ; 

 maternal, clear rings; 2, division of oogonial cell ; 3, first polar spindle ; 4, first 

 polar body; 5, second polar spindle and division of second polar body; 6, egg 

 after extension of polar bodies. 



399 



