EXTENDED SERIES. 



63 



Brown agouti x brown agouti. 



Cross 47. One or both parents homozygous. YiBrtDtPiA* x YJBriDiPiAi. Expectation, 

 all brown agouti. 



Cross 48. Both parents heterozygous in agouti. Y 2 Br 2 D 2 P 2 A x Y 2 Br 2 D 2 P 2 A. Expecta- 

 tion, 3 BrAg, 1 Br. 



Mating. Parents. BrAg. Br. 



104 586x588 



3 1 



Cross 49. Both parents heterozygous in density and the color factor. YB^DdPiAi x 

 YBr 2 DdP 2 A 2 . Expectation, 9 BrAg, 3 dBrAg, 4 W. 



Cross 49a. Both parents heterozygous in density, dark eye, and agouti. Y 2 Br 2 DdPpA. 

 Expectation, 27 BrAg, 9 dBrAg, 9 pBrAg, 9 Br, 3 pBr, 3 pdBrAg, 3 dBr, 1 pdBr. 



Broxon agouti x pink-eyed brown agouti. 

 Cross 50. Brown agouti heterozygous in dark-eye, color factor, and agouti crossed with 

 pink-eyed brown agouti heterozygous in the color factor and agouti. YBr 2 D 2 PpA x 

 YBr 2 D 2 p 2 A. Expectation, 9 BrAg, 9 pBrAg, 3 Br, 3 pBr, 8 W. 



