52 



THE [NHERITANCE OF COLOR IN .MICE. 



Cross 8. Parents heterozygous in color factor, density, and dark eye. YBriB-iDdPpAt x 

 YBrtBaDdPpAi. Should give 27 BAg, 9 dBAg, 9 pBAg, 3 pdBAg, 16 W. 



Cross 9. Parents heterozygous in density, dark eye, and agouti. YzBr-iBiDdPpAx 

 YtBnBzDdPpA . Expectation, 27 BAg, 9 pBAg, 9B,9 dBAg, 3 pdBAg, 3 dB, 3 pB, 1 pdB. 



Cross 10. Parents heterozygous in black, density, and dark eye. Y 2 Br-,BDdPpA2 X 

 Y 2 Br 2 BDdPpA 2 . Expectation, 27 BAg, 9 pBAg, 9 BrAg, 9 dBAg, 3 pdBAg, 3 pi?r^4^, 

 3 dBrAg, 1 pdBrAg. 



Cross 10a. Parents heterozygous in black, density, and agouti Y 2 Br 2 BDdP 2 A X Y 2 Br 2 BDdP t A . 

 Expectation, 27 BAg, 9 dBAg, 9 BrAg, 9 B, 3 dflr.40, 3 d£, 3 jBr, 1 d£r. 



Black agouti x dilute black agouti. 



Cross 11. Giving only BAg young, both parents homozygous. 

 YJirJhU'iA,. 



YiBr.BzDiPtA , X 



