172 



Inheritance of Coat Colour in Mice 



Yellow X Agouti gives Yellow and Agouti. 

 Fi yellow x Fi yellow : 



Yellow heterozygous in agouti x black : 



Yellow Agouti 



11 18 observed 



14-5 14-5 calculated 



Yellow X Chocolate-Lilac gives Yellow and Black. 

 Fi yellow x Fi yellow : 



Here there was an excess of champagnes, no bhie lilacs and only one 

 chocolate-lilac. 



-Fj yellow x F^ black : 



Here there was an excess of chocolate-lilacs, no blue lilacs. 



Dark-eyed yellow heterozygous in pink-eye x pink-eyed yellow ; 



FixFi: 



Yelloiv X Pink-eyed Agouti gives Yellows. 



Dark-eyed Pink-eyed Pink-eyed 



yellow Agouti yellow agouti 



25 17 11 5 observed 



28-8 14-4 9-6 4-8 calculated 



