genetics questions (prediction on how chicks would look)

[Otcho]

How do those genes work like, give one of the pure breeds as an example like the black australorps or my buff orpington rooster, do those genes vary chicken to chicken even if there a pure breed

A breed is a group of animals that produce homogenous offspring. For example, you know that you have a purebred Rhode Island Red rooster and hen whenever you cross them and they produce Rhode Island Red chicks 100% of the time. This means that they carry the same genes relating to plumage, skin color, comb type, etc., and they are the "same breed."

Plumage genes are simply the manipulation of yellow-red pigment (pheomelanin) and blue-black pigment (eumelanin). The e-locus allele is the "base layer" of pigment, determining where the two types of pigment are expressed/shown. Using your Buff Orpington rooster as an example, his e-locus allele should be eWh (Wheaten). Wheaten allows black pigment to be expressed everywhere except a rooster's male-specific feathering, breast and parts of the wing. A Wheaten Marans rooster is a good example of a "plain" Wheaten phenotype (appearance).

The Columbian gene (Co/Co) restricts black pigment from the Wheaten e-locus, causing it to only be expressed in the rooster's neck. Mahogany (Mh/Mh) enhances the red pigment, and Dilute (Di/Di) inhibits it to the orangey color we call "Buff."

Although buff is often a unicolour variety, it is caused by a very different genetic base to black and blue birds. Buff as a variety is generally Wheaten on the e-locus, with Colombian, which pushes eumelanin/black pigment to the neck; Mahogany, which promotes pheomelanin/gold pigment, darkening it to a rich red; and Dilute, which dilutes that red to buff.

 

[Lgbchickie]

Can you tell a chickens genes just looking at it and knowing it's parent breeds?

 

[Lgbchickie]

So this is Cluck's string?

eWh Co/Co Mh/Mh Di/Di

 

[Otcho]

Can you tell a chickens genes just looking at it and knowing it's parent breeds?

You can make educated guesses just by looking at a chicken, but some (completely unrelated) alleles express similarly.

So, if you know the chickens' breed, it's easiest to research what others have documented for that specific breed. I enter keywords like "[Breed] e-locus allele," "[Breed] plumage genetics," or "[Breed] varieties."

 

[Otcho]

So this is Cluck's string?

eWh Co/Co Mh/Mh Di/Di

A chicken has two copies of each gene, so Cluck's e-locus would be written eWh/eWh. Other than that, I'd also add his sex chromosomes (ZZ) to the string.