56 



BATESON AND PUNNETT 



Fig. 1. Diagrammatic representation of the three coloured types which occur in F2 

 from Blanche Burpee (hood white) X E. Henderson (erect white), giving F^ purple 

 erect. I. Painted Lady; II. Purple Invincible; III. Duke of Westminster. 



The erect type of standard is dominant 

 to the hooded type. 



The original cross with which we 

 started was made in 1904 between the 

 two whites, Blanche Burpee ( long pol- 

 len, hooded) and Emily Henderson 

 (round pollen, erect standard). The 

 majority of the Fi plants were P. I. 



(some being whites, others P. L., ac- 

 cording to the factorial composition of 

 the parents), and it is from such plants 

 and their offspring that the data put 

 together in Table II were obtained. 

 From the four Fi plants 773 plants 

 were raised in Fo, with the following 

 results: 



Erect purples Hooded purples Erect reds 



232 83 112 



^ . ' 



315 [326] [109] 



427 [435J 



As was to be expected, the purples 

 are three times as numerous as the reds. 



Whites (erect 



and hooded) 



346 



[338] 



and the coloured are to the whites as 

 9:7. From the F^ generation families 



