Breeding Pen and Genetics Question?

The exhibition dark cuckoo male is lighter than the female as they are homozygous barred so all the progeny should be barred. But it all depends on if the male you use is heterozygous or homozygous for barring.

But yes you will get silver cuckoo as well depending again on the male used.
If he is already carrying gold or not.
 
From the first cross of dark cuckoo marans male on copper black marans female, the offspring, presuming they are carrying the expected genes, will all have a dark cuckoo phenotype.
 

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