F. M. Durham 165 



Golden agouti x chocolate-lilac gives golden agouti F,, 

 GgBbEe x GgBhEe. 



Pink -eyed 

 Golden Cinnamon Pink-eyed cinnamon Blue Chocolate- 



agouti agouti Black Chocolate agouti agouti lilac lilac Champagne 



F,. 



Cinnamon agouti mated with chocolate-lilac giving cinnamon agouti 



Cinnamon Pink-eyed 



agouti Chocolate Cinnamon agouti Champagne 



Fa. Observed ... 14 4 3 1 



Calculated ... 12-3 4 1 4-1 1*4 



Agouti heterozygous in pink-eyed agouti x pink-eyed agouti. 



Agouti Pink -eyed agouti 

 Observed ... 11 8 



Calculated ... 9*5 9-5 



Agouti heterozygous in pink-eye and chocolate x pink-eyed agotUi 

 heterozygous in chocolate. 



Pink-eyed 

 CSnnamon Pink-eyed cinnamon Blue Chocolate- 



Agouti agouti Black Chocolate agouti agouti lilac lilac Champagne 



Agouti heterozygous in pink-eye and chocolate x black ditto. 



Pink -eyed 

 Cinnamon Pink-eyed cinnamon Blue Chocolate- 



Agouti agouti Black Chocolate agouti agouti lilac lilac Champagne 



Observed 61 10 3 6024 



Calculated 93 93 3 1121 



Pink-eyed agouti x pink-eyed agouti. From this mating I obtained 



Pink-eyed Pink-eyed Chocolate- 



agouti cinnamon agouti lilac 



37 4 8 



There were no blue lilacs and no champagnes. The explanation of 

 this may be that the pink-eyed agoutis were not all carrying the same 

 characters. 



Another case I cannot explain is the following : 



An albino heterozygous in E was mated with a yellow carrying 

 agouti. From the agoutis Fi of this union I obtained 



17 agouti, 5 black, 1 chocolate-lilac, 1 champagne and 8 albinos. 



