I had some ideas, so I want to make sure I am right. Okay...

A green budgie has a base colour of yellow, that's why it has a yellow mask and green body. A blue budgie is really just a green budgie, missing whatever makes the yellow..as green minus yellow is blue and yellow minus, well, yellow, would be white. A green is a yellow, with blue over the top, which makes the green. Like you can get Violets in blues and greens, it would have to be another colour again, over the top. So a violet green is a yellow+blue+violet, making that colour.

The gene or whatever that makes so no yellow is produced is recessive, that is why blue is recessive to green.

 

A yellowface blue budgie, is a bird that the yellow-making gene has gone weird even more..not fully working, more like half-working, so that (in most cases, seeing as the spread of yellow varies so much) it is a half blue, half green bird. And again, the yellow is dominant. But it is not the base colour, but a colour added on top of both the white base colour and the blue body colour. It is in the same category as blue though, that is why a green can be split for blue or yellowface (not actually split..masking it..but it's the same idea) and not both.

And pied is another mutation which cancels out all the colour except for the base colour, leaving patches of white or yellow..and an Albino/Lutino is a bird who melanin everywhere is gone, so it is the base colour. (that is why its eyes are red)

Is that all right?

 

Now I'm wondering, if you selectively breed to make a specific appearance..say, breeding Opalines to have no markings between the wings, like people do..if you do that and get a bird that looks like an entirely new mutation, purely from your specifically breeding one bird to another to get it to look like whatever you wanted it to look like instead of it just appearing one day..is that actually a new mutation? If it passes that appearance onto its young and everything, then it is the same as a new mutation that just popped up, right?

I think that's all my questions, I'd really appreciate it if someone could help me answer them.

A blue budgie lacks the yellow melanin that would make it green but the yellow melanin is not quite the same as violet which is a colour adding factor. Inos are lacking all melanin except the base white or yellow

 

Yellow face budgies are often described as being between blues and greens, but it is not as simple as this because, if they were it would be possible to breed a green budgie from a yellow face blue, but you can't. The gene that causes the yellow face is a different gene from the one that makes a green

 

Selectively breeding for a particular trait will not create a new mutation. New mutations are caused by changes to the sequence of the genetic material. They appear because of copying errors in the genetic material during cell division, or by exposure to radiation, chemicals, or viruses

ill leave this question to the more experience budgie owners/breeders, :rofl: :rofl: