420 



Aneuploids and Nondisjunction 



NORMAL 



KWWM . 



ROLLED 



32 3^^S^^4 5^ ^^^ ^-^^-^ 6 7^^^8 

 GLOSSY BUCKLING ELONGATE 



ssssosisiio its^gz£^i2 13ESSM3W ismmniiiiaie 



ECHINUS COCKLEBUR MlCROCARPlC REDUCED 



17^1112^18 

 POINSETTIA 



19 ^^^^20 

 SPINACH 



21 SB 22 

 GLOBE 



2 3p8l 24 



ILEX 



Fig. 115. Seed capsules of Blakeslee's twelve primary trisomic types of 

 Datura stramonium. Beneath each of these trisomic capsules is a diagram 

 of the extra chromosome found in that type with the numbers used to 

 designate its two ends. (Courtesy of Dr. A. F. Blakeslee.) 



