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

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Old 06-04-2009, 01:10 AM
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Post Inheritance of Dark Factors in Budgies

Inheritance of Dark Factors in Budgies

Basic Color Expectations
Easy Understanding With Punnet Squares
by: Corina

This is a guide I put together to help anyone who is starting to learn all about dark factors and how they work. Not long ago I was having trouble understanding so I did some research and asked some questions and this is what I came up with. I also remembered my biology class in my sophmore year of high school and all those punnet squares I did.. I used to love those things! Very fun stuff! I finally found a way to apply those things I learned lol. I don't talk that fancy talk most breeders use so hopefully you can understand me. Here it goes:

So we have the blue series and the green series birds and there is 3 color variations on each:

Blue Series:
-Skyblue
-Cobalt
-Mauve

Green Series:
-Light Green
-Dark Green
-Olive

Now we have the Dark Factor genes which are the ones that make the color variations.

For the punnet squares I will refer to dark factors as follows:

Genes come in pairs so I use one letter for each gene passed by each parent. Like XY and XX in biology. I only used d's because "Dark Factor" starts with d lol the letters don't really matter. You can use big F's and small f's if you want..

d = 0
D = 1

dd = 0 Dark factors (Skyblue or Light Green)
dD = 1 Dark factor (Cobalt or Dark Green)
DD = 2 Dark factors (Mauve or Olive)


Now lets make up some pairings!

1. Light Green X Dark Green or Skyblue X Cobalt.



We get 50% dd which means 0 dark factors (Skyblues and/or Light Greens)
We get 50% dD which means 1 dark factor (Cobalts and/or Dark Greens)

2. Light Green X Light Green or Skyblue X Skyblue.



We get 100% dd which means 0 dark factors so the chicks will all be either Skyblue or Light Green.

3. Light Green X Olive or Skyblue X Mauve.



We get 100% dD which means 1 dark factor so the chicks will all be either Dark Green or Cobalt.

4. Dark Green X Dark Green or Cobalt X Cobalt.



We get 25% dd which means 0 dark factors (Skyblues and/or Light Greens)
We get 50% dD which means 1 dark factor (Dark Greens and/or Cobalts)
We get 25% DD which means 2 dark factors (Olives and/or Mauves)

I didn't make punnet squares for these last pairings but you get the idea..

5. Olive X Olive or Mauve X Mauve.

We get 100% DD which means 2 dark factors so the chiks will all be either Olive or Mauve

6. Olive X Dark Green or Mauve X Cobalt.

We get 50% dD which means 1 dark factor (Dark Greens and/or Cobalts)
We get 50% DD which means 2 dark factors (Olives and/or Mauves)


And those are all the combinations possible.. I think. Pretty easy with the punnet squares right? This works with all mutations since the mutations don't interfere in how the dark factors work. Mutations like lutinos, albinos etc.. still have dark factors but they are not visual.

I have no idea of how the grey factor and violet work.. I'll have to do my research on that!

I want to give some credit to Neville (nev90). I undertstood about the dark factors because of his article on dark factors. It is stickied on this forum. That is the only article that really helped me understand. Then I thought of the punnet squares.. they make it so much easier to calculate color expectations! I'm more of a visual kind of person.. that's why I liked geometry better than algebra


-Corina


Last edited by FaeryBee; 03-23-2018 at 07:23 AM.
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