OF BARRED BREEDS OF POULTRY. 3OI 



the factor 1 for black pigment and the factor for the barred 

 pattern are present together the zygote will show the barred 

 character. In other words there is no evidence that a black 

 bird can carry barring latent. If such a bird has the barring 

 factor at all it will be visible somatically, so far as present expe- 

 rience goes, (b) The white of the White Booted 9 parent must 

 have been "dominant white-," from the account given. This is 

 indicated by the fact that the prevailing color of the FI bird from 

 the cross of this white ? with a black :? was white. A "domi- 

 nant \\hite" bird could carry barring gameticall) for an indefinite 

 period \\ithoni ij- >li.i\\in- -omatically. 



I'rom tin- data ':i\en ii i- po--ib;.- to cotiMruct the following 

 pedign 



I' k d* X \VI. 



_ 



4, 

 I- 1 / Faintlv ; 9 



I l-iilly 1 9 X K 



4 

 1 in--! .ind 9 9 



\o\\ in \ ie\v of the fact that the barred pat lern in all C3 



tar >l tidied behaves as a sex-COITelated character for which the 



leinalc i- |]i.-irrn/\ ^i.u-. thi- |K-( ; gives a remarkable re-i:lt. 



If the baning was latent in the original \\ hite liootrd J , which 



ms probable for the reasons set forth above, the ob-nxed 



ills i, in only be explained on the assumption that th,' factor for 



hairing and the v determiner .iirried in the same 



gamete. Tim- i! tt denotes pre-enci- <if factor for barred pattern; 



II' present e of factor for "dominant \\hiie" ; A' presence t t H tor 

 for black; /' presence of factor t.,r . sex, and ihe correspond 



^mall letter-, the absriuv of the-e tailor-, t lie | icdigree for this 

 black X \\hite CTOSS \\ould ^tand a- |o!lo\\-. 



1 Or factors. I In. 'Helmut tlu- pi I-M -in ili-> u>>iiin it will In- a unn-'l f<-r the sake 

 el \,-il..il . v.,n,,tny tli.il tin- i'luiia> tera in each instance ili-privl iip<>n tin- action of 

 :.v;/i- K-inu-tu lait.'t. It inak. - n difference to the arnuiiH-nt wla-tla-r this is 

 :n-t tru<- in a particular instance. 



