Duplicate genes for capsule-form in Bursa bursa-pastoris. 



115 



a member of family No. 09281, which is included above in Table IE, and 

 is indicated in figure 5 with a star. With reference to the rosette- 

 characters this cross was the reciprocal of the original cross, which had 

 had the form B. bursa-pastoris simplex X Heegeri heteris, and the new 

 cross was made for the purpose of clearing up some of the questions 

 raised by the original cross with reference to the rosette-characters and 

 not with the intention of further testing the inheritance of the capsule- 

 determiners. As it turned out, this extracted dominant had but a single 

 determiner for the triangular capsule. The first generation (No. 10394) 

 was of the expected type, being entirely B. bursa-pastoris heteris. 

 Four self-fertilizations were made among these Fi plants and yielded 

 Fa families having the characteristics shown in the following table. 



Table V. 



Bursa Heegeri simplex (abc) X B. bursa-pastoris heteris (ABC) 

 Fed. No. 09284 | Fed. No. 09281 



Bursa bursa-pastoris heteris (AaBbO) 

 Fed. No. 10394 



Bursa-pastoris Series () 



Heegeri Series (o) 



In the last line of this table is inserted for comparison the summary 

 of the results in the second generation from the original cross, reduced 

 to the same number of individuals. The agreement between the ex- 



