Blue and green egg genetics

[The Rinaest Rina]

I have a flock of backyard mutt chickens. One or two hens lay blue, one or two lay green, and the rest lay mixes of brown, beige, and there's one who lays creamy, almost rosy white occasionally. I've considered separating them one or two at a time to establish a definite who-lays-what list because I only have guesses as to that for now. I really don't know their breeds beyond guessworking based on appearance, except for the hens with feathered legs, who are half bantam cochin. Safe to say that the hens who lay green or blue are part EE and carry a blue egg gene.
Last weekend I adopted a full-blooded wheaten Arucauna rooster, allegedly bought as a chick from a local and reputable breeder. The buyer couldn't keep more than one roo, and I have the space. He's a beautiful and friendly boy and I'm excited about half-Arucauna chicks in the Spring. (Those fluffy cheeks!!!) It got me wondering about what colors his daughters' eggs may be.


A bit of elementary research revealed lots of little snippets of information to me that are now ricocheting around in my head. If one of you educated folks can help me understand it, I'd be very grateful! Most of the resources I found were like, discussions between people who knew and discussed things I don't quite understand yet.

Here is what I know, followed by my questions.

Pea comb gene (Which my new rooster and one of my hens have) is a gene associated with the blue egg gene in Arucauna lines. That means a pea comb hints to blue egg gene in Arucaunas, which is helpful information when you're looking at a cockerel...

Also, olive eggs are just brown egg dye on top of blue egg dye on base white eggs. If you rub them you can often see the color coming off, something I've personally observed.

True or false please: A chicken needs to have two copies of blue egg gene to lay blue eggs? Or does that just mean she's heterozygous? If she only has one copy, could she lay blue eggs and pass the gene on, but she might not lay blue? I confuse myself.

Here's my questions:

If I hatch chicks fathered by my Arucauna and mothered by a hen laying brown eggs, no pea comb, what percent of them would carry blue egg gene? Am I wrong to conclude that brown egg gene + blue egg gene = like 50-25% olive egger? What percent of them default back to brown or blue?

What about the Arucauna x olive egger. Would the daughters lay blue or green eggs? What kinds of percentages do we got here? I haven't seen this laid out in a way that makes sense to me.

I'm going to assume that Arucauna x blue-egg-layer mutt = mostly blue egg layer mutts.

In the event that I cannot restrain myself from hatching many more chicks than I could ever need come Spring, (a very probable outcome) I'd like to give buyers or recipients a good guess at the colors they're going to get. I also love wading into slews of information too deep for me.

I'm a noob but I'm trying! Thank you in advance.

 

[WingItRanch]

I'm sure someone much more educated on the genetics of chickens will respond soon but if you can take a picture of each of the hens in question, we may be able to help identify which ones are more likely to lay blue eggs. Pea comb could be a clue but a variety of breeds have pea combs and not all lay blue/green eggs. Also, leg color may also help. If they have muffs or beards. Do any have a crest?

A good picture of each hen may help narrow down the mystery of who has the blue egg gene.

Also, olive eggs are just brown egg dye on top of blue egg dye on base white eggs.

Not quite. There are two egg shell colors: white and blue. When you crack open a brown egg, the inner shell will be white. When you crack open a blue egg or an olive egg, the inner shell will be blue. The olive is basically a blue egg shell "spray painted" with brown to give an olive green appearance.

 

[WingItRanch]

When I was trying to figure out the egg color genetics, this website made it easier to understand.

https://silverhomestead.com/how-to-breed-blue-green-egg-layers/

 

[Yardmom]

You may have realized this from the chart, but blue is dominant over not blue (white). Since it is dominant it only takes one blue gene for a pullet to lay blue eggs.
If your roo is homogeneous to blue all his offspring are highly likely to lay blue based eggs. The brown still goes over that, so likely different shades of green will be laid by all.
If you mate 2 of his offspring some will end up with eggs that are not blue.