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Go Back   Talk Budgies Forums > Budgie Talk > Budgie Breeding > Mutations and Genetics


Mutations and Genetics Learn about budgie genetics and the wide variety of mutations.

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  #1  
Old 04-26-2010, 12:23 PM
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Default Confusing opaline.

This little chicks here is a male opaline ( preety sure hes opaline)

The mum is opaline but the dad is not. What are the genetics behind this. Does that mean the dad is split for opaline?

They have had 2 chicks before ( 1 male and 1 female) but they wern't opaline

The male is the green chick. Could someone please confirm that he is opaline first please.

I can upload better quality if you wish.




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Old 04-26-2010, 01:06 PM
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You are correct. The male chick is opaline. Your male must carry opaline as well. Both of your chicks are beautiful Congratulations.
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Old 04-26-2010, 01:31 PM
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Ditto. Opaline is sex linked - a cock has to have 2 copies of the gene to show the mutation.
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Old 04-26-2010, 03:04 PM
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but i thought a cock split for the mutation could only produce female opalines. Soes it make a difference that the hen is opaline too?
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Old 04-26-2010, 05:16 PM
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Quote:
Originally Posted by miss parakeet View Post
but i thought a cock split for the mutation could only produce female opalines. Soes it make a difference that the hen is opaline too?
yes it does....

opaline is carried on the X chromosome = sex linked.

male budgies are X/X
female are X/Y

so if you have a male that is opaline he gives all his chicks an X chromosome with the opaline gene = Xopl.

If the hen is not opaline she will give half her chicks an X chromosome without the opaline gene (X) so those chicks will be X/Xopl = split opaline cocks. the other half of her chicks will get a Y chromosome from her so they will be Xopl/Y = opaline hens.

if the male is split opaline he gives half his chicks the opaline gene so you get half the hens opaline.

if the hen is an opaline though, she is Xopl/Y and when bred with a split opaline male X/Xopl (like yours) you get these possibilities:

Xopl/X - split opaline cocks
Xopl/Xopl - opaline cocks
X/Y - normal hens
Xopl/Y - opaline hens

i hope that makes sense. if not just tell me to try again!
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Old 04-26-2010, 06:52 PM
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Check out this link it explains opaline genes quite well.
https://www.****************/gen_opaline.html
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Old 04-26-2010, 07:52 PM
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Tonic is correct. A male split for opaline can only produce normal hens, opaline hens, normal cocks, and normal split opaline cocks. However because this cock was paired to an opaline, she passes one opaline gene to all her sons. This means when she is paired with the cock they can now produce normal hens, opaline hens, normal split opaline cocks, and opaline cocks.
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