222 



BREEDING 



The external appearance of these four zygotic 

 types is given in the subjoined Table ; — 



From this it will be seen that there are nine 

 purple-spotted greys, three greys and four whites. 

 This Table is precisely analogous to that for cotyledon 

 colour and shape. The purple-spotted grey characters 

 correspond to " yellow round " in that, in both of 

 them, two dominant characters are present in the 

 same zygote, either in the homozygous or hetero- 

 zygous condition. The greys correspond to the 

 yellow-wrinkled because they possess only one 

 dominant character, namely grey (in the DE or DD 

 condition) ; and one recessive, absence of purple- 

 spot. 



