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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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Old 11-30-2015, 08:01 AM
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Default Juno's mutation?

Hello all,

Juno is a single, hand-raised chick whose mother has not been feeding consistently (she does contribute now and then!). Mother (Phantom) is a grey opaline dominant pied, I believe, and father (Sterling) looks like a sky blue normal. Any thought based on this picture from 2 days ago, at 2 weeks old? I'll post more later or tomorrow. S/he looks like a grey normal to me, but I know zip about mutations and genetics. It was suggested (thank you Starlingwings!) that s/he might be opaline, and I'd love to understand.

Thank you!
Ilana
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Old 11-30-2015, 09:21 AM
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Very cute baby

With that pairing baby cannot be opaline only possibility if father is split opaline
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Old 11-30-2015, 09:52 AM
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Yes, I know it would be Sterling is split for opaline, which he might be. The question is can you tell at all from the current coloring? I'll repost in a day or two, but was just curious. Thanks!
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Old 11-30-2015, 10:12 AM
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I agree with you grey normal
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Old 11-30-2015, 10:52 AM
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Ilana,
You might enjoy looking through the information in this link:
Budgie Pairing Expectations - Cute Little Birdies Aviary
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Old 11-30-2015, 04:10 PM
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If the down is white rather than grey then it is not likely to be a Normal. A few more days will give us a few more clues, but Opaline seems likely if the down is white.
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Old 11-30-2015, 08:03 PM
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Toni is correct--white down in chicks generally indicates opaline, which is why I suggested that Sterling was split

Because Opaline is a sex-linked mutation, females will always show a sex linked mutation if they carry the gene. This is caused by the gene's location, which is on the X chromosome. Females have one X and one Y chromosome, while males have two X chromosomes. In males, the gene acts "recessive": because of it's location on the X chromosome, they need two copies (one for each x chromosome) to show the trait visually. So, females show it if they have it, and if they don't show it, they don't have it. Males, on the other hand, show the sex-linked trait only if they have two copies. If they only have one, they are "split" (as I suspect Sterling is) and carry one copy of the gene although they don't show it visually.

Does that make sense?
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Old 12-01-2015, 12:14 AM
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Quote:
Originally Posted by StarlingWings View Post
In males, the gene acts "recessive"
Just a comment, it doesn't just act recessive, it is recessive. In other species there are sex-linked dominant genes, in budgie varieties only sex-linked recessive.
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Old 12-01-2015, 05:46 AM
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Quote:
Originally Posted by StarlingWings View Post
Females have one X and one Y chromosome, while males have two X chromosomes.
Maybe I haven't had enough coffee yet, but isn't it the other way around?

Thanks for explaining about the down - very cool!

Ilana
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Old 12-01-2015, 12:01 PM
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Quote:
Originally Posted by Ilana View Post
Maybe I haven't had enough coffee yet, but isn't it the other way around?

Thanks for explaining about the down - very cool!

Ilana
You've had enough coffee but maybe Starling needs some!

Females have XX
Males have XY
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