Can someone help me with Partridge color genetics?

[CayuseRanch]

Ok, I have a black cochin roo over 2 partridge cochin hens. I hatched out one of their eggs in my last hatch to check fertility. I assumed since it kind of has a chipmunk look that it was partridge. I got online to the color calculator and it says that that I should only get black from this match. Any thoughts or explanations would be appreciated.

 

[Illia]

How true of a striped/chipmunk chick was this? Was it really dark or pretty light and defined?

How about the black parent? Did it come from any birds who had leakage/brassiness on them? Does it have any color? (silver, gold, or red in the neck or saddle)

Your blacks may already possibly be carrying some recessive partridge or something.

If the chicks are dark brown though then it's normal, any striping may just be from residual pattern gene showing through from the Partridge parent.

Partridge x Black = mostly black birds with some gold here and there. Chicks will be dark brown or black with brown faces. Some might be dark brown striped.

 

[Sonoran Silkies]

The chicken calculator makes assumptions about the genes based upon the colour you specify. These assumptions are not always accurate for a specific bird.

If you specifiy that the colour is black, it assumes that the bird is E/E. The reality is that you can make a completely black bird on any e-allele except wheaten. Chances are pretty god that your black cochin is not E/E, and is in all likelihood e^b based. If the chicks are partridge striped, then the black is at least split for e^b.

 

[CayuseRanch]

The roo is pure black. He came from a local breeder as a chick. He doesnt have any other color to him just a shiny black. I would say the chick is light not dark, I don't have a great picture. The one on the left is maran.

 

[CayuseRanch]

Wow Sonoran, I am lost lol

 

[Sonoran Silkies]

A pure black bird can be built on any base except wheaten. Additional melanizer genes can turn a not completely black bird completely black. Even an E/E bird is not completely black without added melanizers.

Your chick looks partridge; now the penciling may not be as precise as it would be on a bird who inherited the genes for pattern patterning from both parents, but you will not know that until you see adult feathering.