Double factor yellow cock

Includes Species Profile.
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davlee
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Posts: 148
Joined: 18 Jun 2015, 14:14
Location: Richmond, S.A.

26 Jun 2019, 18:05

I purchased a "red head white breast double factor yellow Gouldian cock."

What does double factor mean please? Is it likely an Australian yellow or something different?
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Tiaris
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Location: Coffs Harbour

26 Jun 2019, 18:58

Double factor is a homozygous dominant form. This means it is a mutation with a dominant mode of inheritance and that it carries 2 mutation genes.
It is likely a European yellow-backed mutation (not Australian yellow which is a recessive mutation). In this mutation, double-factor yellows exhibit brighter yellow than does a single-factor. The white-breasted gene also contributes to a more yellow back colour but this is usually only noticeable on single-factor birds which are yellow in white-breasted but just pastel green in purple-breasted birds.
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davlee
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Posts: 148
Joined: 18 Jun 2015, 14:14
Location: Richmond, S.A.

27 Jun 2019, 13:10

Thanks for the comprehensive answer.
This cock now has young in the nest. The hen is a green back white breast red head. What is the likely outcome for the young? Will the hens likely be yellows?
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nxe04d
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Joined: 25 May 2010, 19:27
Location: Bellbird Heights NSW

27 Jun 2019, 19:23

50% RHWB Single Factor Cocks 50% RHWB Single Factor Hens (All Yellow)

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