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Discussion Starter · #6 ·

this hen is from a ash red bar cock and a pure white hen then dad of this hen also had blue bars with this same white hen the black and white cock was from two pure white but with one black feather
 

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Discussion Starter · #9 ·

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red colour pigeons are quite unusual!our red one is actually a brick colour with white splash wings,she was mostly red till moulting an dshe became more white,i like the black splash in the pics,how does the lovely violet/lavender colour come about?its a really strange colour,noticed also one of our blue bars is a powdery blue colur,real pretty
 

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Ooo, I like that roller cock. I used to have some just like that; very pretty :)

Since he's a baldhead, you'll probably get some baldhead babies, or birds with pied markings. You'll get lavenders and blacks. If both the parents of the cock had black feathers, then he is homozygous for spread. Therefore, all the kids will be spread as well. If he was het. for spread, then half the kids of either sex, would be spread. So then you could get blue, black, red, and lavender.
 

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question

how does the sex link work? can someone explain it a bit? I have a pair of blue fantails and they have had two young so far. One is a nice grey or blue, and the other is "well red wings and body, with dark blue/black tail and feet. not sure about the head yet. looks dark so maybe blk aswell.
 

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Alright. Colors and sex-linked traits are only carried on the X chromosome.
Cocks have two X chromosomes (XX), where hens only have one (XY).
Say your cockbird is a pure blue (since the only thing blue is dominate to is brown, unless one of its parents was brown, it'll be a pure blue). And your hen is red. The cock has two doses of blue, one on each X chromosome. The hen can only carry one dose of red.
All you have to do from there is a simple punnett square. You'd find that all the cocks have one gene for red and one for blue. Red is dominate, so the bird will be red, but it will also carry that hidden blue gene with it. All the hens only have room for the blue, so they are blue.


So that's why that sex-link mating works out the way it does :p

In summary, a sex-linked trait is basically just a gene that is associated with one gender or the other, because it's either carried on the X or Y chromosome. That's why some baby chickens can be sexed at hatching because of a white spot on the head, etc. Cause those traits are only found in the males or females :)
 
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