'^•7 3 , 3,, ,., 1.0 L. 2.. 2.1 (I.O 



'^*"2.2 2.1 2.2 3.2 3.a 2.i I.. (2.0 



16.8 



2.1 3.a 2.0 2.1 3.1 2.2 2.i (!.•) 



17.8 V 



' 3.1 4-4 2.1 3.» 3.1 2 « - (2.i) 



1 



#0 Mj( 



4-2 2.» 3.2 4.2 2 



' '"' 4.2 . 2.2 3.2 2.2 3.2 3.. 0.6 



Fig. 49. — Side view of first metaphases in Secale ceveale {n = 7) with 

 one pair of supernumerary fragments. Six different forms of 

 fragment — pair depending on the numbers and positions of 

 its chiasmata. E and F, two mutant nuclei heterozygous for 

 an interchange. X 1200 (D., 1933). 



E 

 17.. 



/ 4.11 2.. 3.1 4.2 2.. 2.1 <2.i) 



F 



