V. 





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i . 



f 





V ■ 



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4 



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V 



C^ <) 



PLATE V. Meiotic chromosomes of Zeo mays, the corn plant, stained with acetocarmine. (o) Lep- 

 tonema. (b) Pachynema, (c) Diplonema. (d) Diakinesis. (Cour/esy of M. //I. Rhoades. Figure b is 

 by D. M. Morgan.) 



