THE CHROMOSOMES 



179 



had first occurred, Winkler is inclined to ascribe 

 the results to some special conditions that are thus 

 introduced. 



In somewhat the same way Winkler obtained a 

 giant nightshade plant. The ordinary cells of the 



Fig. 47A — Chromosomes of normal and of f^iant tomato, a, pollen 

 mother celhof tomato with 12 chromo.somes. b, somatic cell of tomato with 

 24 chromosomes, c, i)olleu mother cell of giant tomato, with 24 chromo- 

 somes, d, somatic cell of giant tomato with 4<S chromosomes. (After 

 Winkler.) 



nightshade contain 72 chromosomes (Fig. 47 B, b), 

 and the pollen mother cells 36 chromosomes (Fig. 

 475, a). The cells of the giant nightshade con- 

 tained 144 chromosomes (Fig. 47 B, d), and the 



