474 GENETICS OF SOMATIC CELLS 



in vitro. The threshold dosage of colchicine for human cultures is 5 x 10 ~ 8 M, as 

 reported by Levan 779 and utilized effectively by Ruddle, et a/. 1084 Renal cells of the 

 monkey respond favorably to a colchicine concentration of 25 y/ml. (0.0025 per cent), as 

 Fig. 54. Bender's modification of ford and hamerton's 386 technique for bone marrow 



AND EMBRYONAL TISSUES. 



« 







»4 *» 



♦ 





I V 





(Air-dried. 1525 X.) 



Top left (a). Embryonic cell of C3H mouse, sex unknown, aceto-orcein. 

 Top right (b). Bone marrow of Chinese hamster, male, aceto-orcein. 

 Bottom left (c). Bone marrow of Chinese hamster, male, Feulgen. 

 Bottom right (d). Bone marrow of Chinese hamster, female, aceto-orcein. 



