several questions on genetics

[Kev]

Quote:
Yes and no.. Andalusian blue and "blue" mentioned in various breeds such as blue wheaten OEG are the same gene. Any blue that throws blacks(normals)/blue/splash is this "blue factor".

Lavender is the other blue gene, often called either lavender or self blue. This is the one that "breeds true".

The poultry hobby is very prone to giving multiple names for the same gene AND giving same name to several different genes.

 

[Sonoran Silkies]

Sonoran Silkies wrote:

Blue to blue does not (about half the offspring will be blue and the other half black).

This is not true, blue x blue produces 25% black, 50% blue, and 25% splash. Black x blue produces 50% black, 50% blue.

You are right. I caught it as I was writing and forgot to change before sending. My goof :O​

 

[Sonoran Silkies]

The poultry hobby is very prone to giving multiple names for the same gene AND giving same name to several different genes.

And the same variety (colour) name to entirely different colours in different breeds.​

 

[Kev]

Yeah and giving wrong names to wrong colors.. one I often notice is calling leaky blacks with barring "Crele". Crele is supposed to be barring over e+ only..

 

[Sonoran Silkies]

How can you tell the difference? I know that a number of varieties can be achieved with different genetic combinations.

 

[lilshadow]

I am sorry about this, but I am still confused. I admit that I am not very smart when it comes to this, and I really want to understand, but I don't. It has to be broken down in laymens terms to me. For instance: If I cross a Blue Andalusian rooster with say an EE hen what color would that produce? What color would the egg be? If I cross a black EE rooster with a Blue Andalusian hen what color would the off spring be? If I cross a Black Copper Marans rooster with an EE hen what color would the egg be. I am really sorry that I am being difficult on this I just do not understand the genetics, or even know what chickens have what genes. I know that roosters have two z chromisones(sp), if that is even right. Thanks again for being patient, and not telling me I am stupid.
Veronica
PS
I want to get an olive green egg, and I want to get BLRW. So I just need to know what to breed to what.

 

[Kev]

That is true, blacks are a good example. Sometimes it is impossible to be sure what e base they are on without test mating. Usually yellow legged blacks are eb based though.

Crele roosters should have the duckwing patch among other little things. They hatch out with e+ chick down pattern(with the white headspot being more or less noticeable). If they hatch out anything other than e+ down pattern, they are not crele.. although barred wheaten roosters can look the same as true creles. It's much easier with crele hens, they are always wildtype. The barring on hens often are far less distinct though. One useful way of determing if a stock is truly crele is to check out the hens- if they are solid barred or black barred with leaky necks, they are not true crele.

Sometimes it's extremely plain, such as barred buff laceds being called crele....

 

[Kev]

lilshadow,

The problem is.. it's a complicated answer due to the fact theres many different genes for eggshell color. There are several different ones just for the tinted color, a few for brown, even a few for white. And then there's the matter of the parents being pure or not pure for the various genes- including if the rooster OR hen is pure for the blue/green eggshell genes. So the result of a mixing, especially in case of EE is more of a broad spectrum because of that.

Very, very generally, expect greenish eggs in a cross. Don't be surprised if brown or tinted eggers also show up though.

Black EE and Blue A. hen is very easy one to answer, fortunately!

Half black and half blue offspring from this, irregardless of sex.

BC Marans x blue/green egger EE= most likely olive colored eggs

 

[lilshadow]

Quote:
Thank you, I have really tried to understand this. I am sure I will have more questions if that is okay, but later on...lol. So, if my Blue Andalusain roo mates with my Blue Andalusian hen, I will get all blue or bbs, and if he mates with my splash andalusian I will get a mixture? I told ya I wasn't very good at this.

 

[Kev]

Ask away! Genetics is very confusing to most people anyways. I had a hard time at the start too. There's still a few things that just make me slack jawed n' blank eyed.....

Blue x Blue= 1/4 black 1/4 splash and half blue.

Blue x Splash= 1/2 blue 1/2 splash.

See, kept it simple.. this time..