22 



SEX IN MICROORGANISMS 











* irf," • 







Fig. 3. E. coli K-12, haploid. 



Fig. 4. £. co/i K-12, diploid. 



This photograph and Fig. 3 are taken from Osmic-HCL-Giemsa preparations by 

 Miss E. R. Lively and are reproduced here at about 2,500 magnifications. Both include 

 some cells that appear to display mitotic figures and others that do not. 



