Yes.
That sounds about right, except that the chances of your hens passing columbian and ginger together are slim. So I still suspect the Legbar of responsibility. The eggs would be green though, not blue.
He sounds like your culprit.
Only if she has Columbian and ginger, I think. Cream Legbars have neither. EEs have those genes but rarely. So I bet it’s the CLB.
Yes
Only the pullets would have dark legs, and those might come later.
That cross might produce only stubby feathers on the legs. I’m a bit more concerned about the color though. That cross should only produce dark chicks. Are you sure no other roosters got in with the EEs?
Dermal melanin, which causes slate and willow legs is recessive sex linked. Lavender Orpingtons technically have white legs but the dominant extended black gene (which is what they are based off of) gives them black epidermal melanin even though they are actually white. So the breeds he is...
It means it isn’t a mutation. It is what original red junglefowl had. They have slate W+W+id+id+ legs.
That wouldn’t work the same. You’d get all yellow leg offspring. (Unless the yellow legged cock carried id+.) The cockerels would carry the dermal melanin gene, but you wouldn’t be able to...
It’s not super complicated.
He must be wwid+id+ which means when bred to non-slate-legged, non-green-legged hens you’ll get dark legged pullets and light legged cockerels. The only problem is the pullets might developed leg pigmentation only after they hatch.
There are two genes that effect leg color. (Other genes that effect the plumage may effect them as well.)
w =yellow legs.
id+ =dermal melanin (A sex-linked gene, meaning females only get one copy.)
The plus sign + means wild type.
If the letters are uppercase they are dominant and the above...