98 



LOCK : PRESENT STATE OF 



A less common cause of confusion is the tendency for 

 normally yellow seeds to retain some traces of the green colour 

 characteristic of the unripe condition, especially if fchey are 

 dried off very rapidly by artificial means. It is doubtful 

 whether there is any exception to the rule that yellow and 

 green seeds are readily distinguishable on a heterozygote plant, 

 if the contents of each pod are examined as soon as thoroughly 

 ripe in reasonably good weather. 



The result of numerous subsequent observations, therefore, 

 is simply to confinn Mendel's original statement. The 

 numbers dealt with by different observers are given in the 

 following table : — 



Colour of Seeds. 



F 2 



F 3 



F 4 



In this case also a sufficient number of crosses have been 

 carried out between the heterozygote and the parental types 

 to demonstrate Mendel's deduction from the facts of segre- 

 gation . 



Heterozygote crossed with Dominant. 

 Observer. Yellow. Green. 



