EXTENDED SERIES. 



69 



Cross CS. Both parents heterozygous in dark eye. Y 2 Br 2 B,l)J' /> x YtBnB/JJ'p. E>. ;.<<■- 

 tation, 3 B, 1 pB. _ 



Mating. Parent: 



B. pB. 



197 



1363 x 1435. ! 1 



Black X pink-eyed black. 

 Cross 69. Both parents homozygous. YJir^J)^ X YiBrJlJ).^. Expectation, all B. 



Mating. 



306 



Parents. 



1695X//1510.. 16 



Cross 70. Black heterozygous in dark eye crossed with homozygous pink-eyed black. 

 Y L BrJl_D 2 Pp x Y 2 Br 2 B 2 D 2 p 2 . Expectation, 1 B, 1 pB. 



Black x brown. 

 Cross 71. Both parents homozygous. YJSriBiDiPz x Y 2 Br 2 D 2 P 2 . Expectation, all B. 



Mating. Parent.-:. 



B. 



474 Unmarked x 68.. 4 



Cross 72. Black heterozygous iu black crossed with homozygous brown. Y 2 Br 2 BD 2 P 2 X 

 Y 2 Br 2 D 2 P 2 . Expectation, 1B,1 Br. 



Cross 73. Black, heterozygous in black, dark eye, and the color factor crossed with pink- 

 eyed black heterozygous in the color factor and black. YBr 2 BD 2 Pp x YBr 2 BD 2 p 2 . 

 Expectation, 9 B, 9 pB, 3 Br, 3 pBr, 8 W. 



Mating. 



Parents. 



B. pB. Br. pBr.\ W 



420 Unmarked x 3307... 3 2 



