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Genes that can mask dominant genes?

post #1 of 17
7/28/12 at 7:50pm
Thread Starter 

I have a mutt rooster that when bred to pure hens(brahma and wyandotte) is throwing traits that neither bird have. I have 2, 5 toe quail size chicks and a few that appear to be fibromelanistic. Could my 4 toe roo actually be 5 toed but just missing the extra toes?

   half mutt half light brahma  Is this fibromelanism?

 

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post #2 of 17
7/29/12 at 2:31am

Sometimes a gene fails to express. Any other roosters near?

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post #3 of 17
7/29/12 at 5:57am
Thread Starter 

No other roosters. I actually went 3 months roosterless before I got him and all the hens were raised from chicks. Perhaps he has silkie in his background.  Is there a way to know 100% that the above chick is Fm?

 

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post #4 of 17
7/29/12 at 3:31pm
Thread Starter 

My roosters shanks are white with black spots. I found another site that showed a pic of heterozygous birds that were spotted with black on the shanks and carcass. This may explain how he might be throwing Fm chicks.

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post #5 of 17
7/29/12 at 11:05pm

He doesn't look Fm to me, and the chick could well be a plain (extended) black.

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post #6 of 17
7/30/12 at 8:58am
Thread Starter 

Your right, I checked them all last night. One has yellow toe nails and the other has a light colored mouth and the start of red wattles.

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post #7 of 17
7/30/12 at 9:19am
Quote:
Originally Posted by ThiefPouter06 View Post

I have a mutt rooster that when bred to pure hens(brahma and wyandotte) is throwing traits that neither bird have. I have 2, 5 toe quail size chicks and a few that appear to be fibromelanistic. Could my 4 toe roo actually be 5 toed but just missing the extra toes?

   half mutt half light brahma  Is this fibromelanism?

 

700

 

1000

 

 

 

that´s easy, your rooster is Id/id+ Fm/fm+ meaning he has dominant dermal ihibitor(Id with recessive id+) ihibiting the expression of dominant Fibromelanotic... when crossed to your hens, some of the chicks(pullets) will inherit his father´s id+ gene along with his Fibromelanotic gene allowing for a full expression of fibromelanotic... the black chick its a pullet

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post #8 of 17
7/30/12 at 9:22am
Quote:
Originally Posted by ThiefPouter06 View Post

Your right, I checked them all last night. One has yellow toe nails and the other has a light colored mouth and the start of red wattles.

those chicks are lacking the Fm gene or have the Id(inhibiting Fm) or are both Id/- fm+ or Id/- Fm

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post #9 of 17
7/30/12 at 9:23am
Quote:
Originally Posted by Henk69 View Post

He doesn't look Fm to me, and the chick could well be a plain (extended) black.

he could be, but Id is inhibiting Fm to be expressed, and the black chicks are just ER/eb birds and as young they will remain black, but at later time could look ER like thir dad(their dad is clearly ER)

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post #10 of 17
7/30/12 at 3:33pm
Thread Starter 

Interesting. I also thought she was a pullet because she is from a large fowl light brahma and since hatcing she appears to be bantam size. I think the roo has sebright blood and I also read that the sebright has a sexlinked bantam gene.

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