Duplicate genes for ciipsule-form in Bursa hursa-pastoris. 



105 



additioual F:i families whicli Liave been grown since, make tlio case 

 for duplicate determiners much strougei', as will he readily noted in 

 the following: table. 



Table II. 



Ped. Nu. 



of Po 



Ped. No. 

 of P, 



Number of 

 hursa-pastoris 



Number of 



Ratio 



Percentage 

 dominants 



06197 



Total 

 Expected 



2644 



Total 



K \ p e c t f 



1.504 



'I'otal 



Ex pec ted 



57.1 

 561 



177 

 188 



1 : 

 1:0 



19-6: 1 

 15-0: 1 



3-25 : 1 

 3-00:1 



lOII'(M) 



100-00 



95-14 

 93-7.1 



76-46 

 75-00 



The three kinds of families expected in the Fs are arrang-ed into 

 corresponding- groups in this table, and if family 092.58 is conectly 

 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 pi-oliable 

 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 tliis ex- 

 pectation on an extensive scale, but six F4 families derived from this 

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

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



Induktive Abstammungs- und Vererbungslehre. XII. 8 



