Ciao tutti,
Carlo, I explained about the "Ml" and "Mh" as I interpretate the working of these genes by making comparations of there effects in certain crosses. There are of course the written genetic rules and these say contratictory to what I say ! For example, "a Dominant gene (as are "Ml" and "Mh") need only ONE allel to have the same effect in the phenotype as TWO allels". In other words "Mh/mh+" should have the same phenotypical effect as "Mh/Mh". For what I have seen is this NOT correct. I can present several different examples to prove this if you want.
(This gives at the same time an answer to your question "What did you mean with your last sentence?"
The excistance of Autosomal red (Ar+) is NOT officially recognized nor investigated scientifically but known by every "Argento" breeder ! (Autosomal red means this "red" comes in the both sexes so it is NOT sex-linked as the gold (s+) is.
It was given the symbole "Ar+" by an author of "a" genetic book.
It is a partically Dominant and original ("ghost") gene. (Dominat you can see because written with a Capital letter and original because followed with that "+").
When a chicken have the Melanotic or Mahogany gene it give his effect over the complete feathering (not only on the place where you seen the "shine".
When present Melanotic you can see a "green" shine.
When present Mahogany you can see a "violet" shine.
Both, Melanotic and Mahogany are pigment "intensifieres", Melanotic for the black-pigment, Mahogany for the red-pigment.
Danny
[Modificato da Danny_57 11/01/2011 17:04]