Young chicks can be sexed by the colour of their down shortly after hatching. The 'barring' pattern is sex-linked, i.e. the males have two chromosomes for barring and the females only one. Day old chicks have a light patch on the top of the head.
These chicks are on the eb/eb with the Barring gene (B/B for the male and B/- for the female)
as you can see the B/B male (double doses) is lighter colored than the female B/- (single doses)
[Modificato da Danny_57 08/08/2012 10:12]