HOWARD AND HOWARD. 3 1 



In one of these crosses (Punjab Type 9 x Punjab Type 25), a 

 large number of the three kinds of F 2 plants were grown and the V 

 generation examined. All the fully bearded plants and those with 

 tips bred true, while the half bearded plants again split up into fully 

 bearded, half bearded and tipped plants in the ratio 1 : 2:1. The 

 details relating to thirty-one of these cultures are given in the fol- 

 lowing table : — 



Table XIV. 



The F z generation of a cross between bearded and tijiped parents. 



Ratio. 



•96 : 2 : 1 



The crosses between bearded and beardless plants in which the 

 Fx generation was apparently beardless will now be considered. 



