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Discussion Starter · #1 ·
Another question on yellow-face genes, if U could consider....

ATV's response earlier on thread:- http://talkbudgies.com/vbfavorites.php?do=add&entry_type=post&entry_id=771997....indicates that even with both **** & hen birds carrying GF / YF genes...not all chicks will inheret / be split for YF/GF...

...however question is: "what will the percentage offspring be in this type if only one parent, say the **** carries this gene?"

Reason for asking, is whether it's worth-the-while attempting to get YF off-spring from a single parent carrying such genes?.... and what the "statistical population size" need to be before you are succesfull?

I had these following 2 birds breed...
****:- Budgy12-2010_0183e-sm.jpg

Hen:- Budgy04-11_0041e1.jpg

............but with the Hen not being able to feed the chick past day 4 (likely no crop-milk / inexperienced mom)....I've only managed to get 1 chick from 2 nests of this pairing (by swopping chick into "surrogate-nest")...

Budgy03-11_0008e1.jpg
...and "he" (to young to tell sex yet) seems to have turned out to be "non-visual GF/YF"...so more attempts needed I guess...

..however if the hen do not improve her feeding, what's the benefit of continue pairing such up?

Thanks for ur time,

JacodK
 

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There are 3 types of Yellow face on a blue bird. They are all dominant mutations but they are unrelated to each other. They are all available in both single and double factor and like most other mutations a bird can be more than one type.

If a single factor yellow face is mated to a blue white face bird you'll get about 50% yellow face

If a double factor yellow face is mated to a blue white face bird you'll get 100% yellow face

With the type 2 yellow face and the golden face mutations the yellow spreads less in the double factors.

Double factor Type 1 yellow face birds have white faces and are visually indistinguishable from ordinary white faced birds but when they are bred they will produce yellow face chicks

The chick you have pictured has not inherited the type 1 yellow face gene from his father
 

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Discussion Starter · #3 ·
Thanks Nev,

So this means that even if the YF is co-dominant it's does mean a 100% transfer of the gene to the young!

Good to know the father is then a YF1 SINGLE FACTOR....

A lesson well-learnt then...

Good day 2 U,
JacodK

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There are 3 types of Yellow face on a blue bird. They are all dominant mutations but they are unrelated to each other. They are all available in both single and double factor and like most other mutations a bird can be more than one type.

If a single factor yellow face is mated to a blue white face bird you'll get about 50% yellow face

If a double factor yellow face is mated to a blue white face bird you'll get 100% yellow face

With the type 2 yellow face and the golden face mutations the yellow spreads less in the double factors.

Double factor Type 1 yellow face birds have white faces and are visually indistinguishable from ordinary white faced birds but when they are bred they will produce yellow face chicks

The chick you have pictured has not inherited the type 1 yellow face gene from his father
 

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Discussion Starter · #4 ·
meant to say "... even if the YF is co-dominant IT DOESN'T MEAN a 100% transfer of the gene to the young!..."

JacodK

Thanks Nev,

So this means that even if the YF is co-dominant it's does mean a 100% transfer of the gene to the young!

Good to know the father is then a YF1 SINGLE FACTOR....

A lesson well-learnt then...

Good day 2 U,
JacodK
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