She looks double factor because the single gene expresses itself completely in hens since they can only be single factor. In males, being single factor the single yellow gene still competes partially with the genes responsible for normal green body, resulting in a diluted color (except if the male has a lilac or white breast). So any genetically yellow hen will always be visually yellow regardless of breast color and will always be SF. Tiffany
From: pete bird <bird91007@...> Sent: Saturday, July 11, 2009 5:13 PM To: GPA101911@yahoogroups.com Subject: RE: [GPA101911] DF yellow
Thanks James.
but the yellow female looks DF for me
--- On Fri, 7/10/09, James <zabadak@git.com.au> wrote:
From: James <zabadak@git.com.au> Subject: RE: [GPA101911] DF yellow To: GPA101911@yahoogroups.com Date: Friday, July 10, 2009, 9:42 PM
Tiffany and Peter,
Hens actually have two sex chromosomes, one male and one female. The reason that the hen has only one gene for yellow body (pastel) or one gene for red head is because the pastel gene and the black head gene are both sex-linked carried on the Male Chromosome. The female chromosome does not carry any genes affecting colour.
Thanks for the reply Fumi. I didn't realize that you had handfed that clutch! Must have been hard to lose the dilute, after the time spent handfeeding him. ...
At least we can see now from this photo that it is a Silver, and not a Yellow as someone else thought. ... -- Tiffany http://www.gouldiansgalore.net...
IÂ believe no one stated yellow on my silver chick. I found couple of emails in my spam message folder. This one too I found in there. Â I guess you thought...
OK I am trying to sort out yellow back genetics. I have a visual yellow hen that I was told is split to blue (I realize hens can only be single factor yellow...
Paula, If you pair her one of your Blue males you will likely get pastels Here is the Forecast for that pairing 25% Male >> Red (Head) - Purple (Chest) - SF...
Yes - hens can only ever be single factor for the yellow mutation, and purple breasted yellow males are DF. It sounds to me like you understand it just fine! ...
Hi Paula. I might be confuse here. YOu mean no DF yellow on a yellow female? It can only be in the male yellow only for DF?  Tell me about the yellow...
Yellow is sex linked. Since females only carry "one" sex chromosome, they can only be SF for any genes carried on the sex chromosome. Thus Yellow hens are...
Tiffany and Peter, Hens actually have two sex chromosomes, one male and one female. The reason that the hen has only one gene for yellow body (pastel) or one...
Thanks for your answers everyone -! glad I understand that mostly correctly. I'll save the dilute male for someone else then -- I have several blue males I...
You could put him with a Yellow hen and get Dilute and DF Yellow males, Yellow hens and Normal Hens :) Or if you put him with a silver hen you would get all of...
I don't think he is split for anything. I asked and was hoping split to blue, but pretty sure they said no. But he is so gorgeous I couldn't pass him up. ...
Maybe I should have explained it better, but I was trying to be simplistic ... I realize they have two sex chromosomes.. but this information will help others....
Biting my tongue regarding your double standard with respect to "simplistic" explanations. ... From: Tiffany Park To: GPA101911@yahoogroups.com Sent: Saturday,...
Clearly from this email It would appear, to me, as though you weren't. Either way, I recognize the discrepancy - but I was also replying from my phone, in the...
She looks double factor because the single gene expresses itself completely in hens since they can only be single factor. In males, being single factor the...
Paula ,, I hope this helps ,, Miles  Male Gouldian Back colors SF = single factor ,,,, DF = Double factor  Normal = green back DF Green Dilute = SF green SF...
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