230 



BREEDING 



Gametes of Pink 

 Pb Pb 



3 pB 



O 

 -(J 

 O 



The last remaining white, No. 16, which produces 

 one kind of gamete only (pb), carries no blue at all, so 

 that when mated with pink it will produce no purples, 

 but only pinks. Thus : — 



pb X Pb = Ppbb 



The total result of mating these three zygotic 

 types of white-flowered peas of the second hybrid 

 generation with pure pinks may be represented in 

 tabular form, thus : — 



That is to say, equal numbers of purples and pinks 

 will be produced on the average, if a large number 

 of crosses are made ; and, if the theory expressed in 



