A tought !? Gray chick = female, Black chick = male.
Could the difference of intensity of the chicks pluff come due the absence of "id+" ?
(Most probably) the father was E/E S/S mo/mo (w/w) fm+/fm+ Id/Id H+/H+, the mother was E/E S/- Mo+/Mo+ (W+/W+) Fm/Fm id+/- h/h
Because of the sex-linkage of "id+" the mother could give this only to her sons and not to her daughters.
The chicks genotype should be E/E S/S*S/- Mo+/mo (W+/w) Fm/fm+ Id/id+*Id/- H+/h
Both chicks have pigmented skins (Fm/fm+ = autosomale & incomplete Dominant) but both have also dark shanks (with lighter toe tips) !!
Is this an unlikely argument?
[Modificato da Danny_57 05/04/2012 16:20]