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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.
Thread Description:I'm not kidding. I've confused myself.

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Old 10-01-2012, 02:04 AM
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Default A Very Confusing Understanding

This isn't exactly about mutations, more about genders, but it's really about predicting genders via mutations, so I figured it could go here... Is anyone else confused yet?

Basically, my latest clutch has produced an opaline sky blue chick.

The parents are a light green opaline spangle mother (who is apparently split to blue) and a normal sky blue father.

Now, if I'm thinking right, for this pairing to have produced an opaline, the father must also be split for it.

If I remember correctly, opaline is carried on the X gene, which means that a hen would only need one copy of the gene whilst cocks need two. If this chick turns out to be a hen, it would mean that the father's opaline would be on the X(1) gene, which means he would always produce opaline hens, am I correct?

I apologise if this makes no sense whatsoever, but I have a couple more 'theories'/questions, mostly based on mutations alone now.

My bird Gidget still fascinates me. He is a white-based DF spangle, which is fine until you think that his father is a yellow DF spangle (presumably yellow face 2), and the mother is a Type II Yellow Face Opaline Spangle Cinnamon Sky Blue. How is it that this pairing produced a white chick?

There is also the fact that the father has no iris rings, which would lead me to believe that he is a dark eyed clear, normally. But his eyes seem black rather than plum. In this same clutch they produced a pale yellow hen with no markings, but she too has no iris rings. Is it possible that I've had these mutations wrong?

Ahhh I'm even more confused now.

... I apologise if this is nothing more than the ramblings of a crazy person.

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Old 10-01-2012, 02:29 AM
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Your opaline chick could be either sex because to be opaline the father must have an opaline gene and as the mother is opaline the chick could get an opaline gene from both sides and be male

If your male was mated to a non opaline hen he would produce about 25% female opaline chicks, but mated to an opaline hen he would produce about 50% opalines of both sexes

Your white double factor spangle has received a blue gene and a spangle gene from each of his parents. This pair would be expected to produce about 6.25% white double factor spangle chicks. The father is probably a double factor spangle masking recessive pied, which accounts for the lack of an iris ring
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