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



105 



additional F 3 families which have been grown since, make the case 

 for duplicate determiners much stronger, as will be readily noted in 

 the following table. 



Table II. 



The three kinds of families expected in the Fs are arranged into 

 corresponding groups in this table, and if family 09258 is correctly 

 placed in the third group, as is here done, the numbers of the families 

 in the several groups present the series 7:6:5, the most probable 

 series for eighteen families being 8:5:5. 



The families in the first group are expected to breed true in sub- 

 sequent generations, and it was not deemed necessary to test this ex- 

 pectation on an extensive scale, but six F 4 families derived from this 

 group were grown incidentally in relation to other problems, and these 

 included in the aggregate 663 B. bursa-pastoris and no B. Heegeri. 



Induktive Abstammungs- und Vererbungslehre. XII. g 



