Dark Budgerigar Mutation

The Dark budgerigar mutation is one of approximately 30 mutations affecting the colour of budgerigars. It is part of the genetic constitution of the following recognised varieties: Dark Green and Olive in the green series and Cobalt, Mauve and Violet in the blue series.

Read more about Dark Budgerigar Mutation:  Appearance, Historical Notes, Genetics

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Dark Budgerigar Mutation - Genetics
... The Dark mutation has an incompletely dominant relationship with its wild-type allele ... In the green series varieties the Dark Green has one Dark allele and one wild-type allele at the Dark locus and the Olive has two Dark alleles ... blue series varieties the Cobalt has one Dark allele and one wild-type allele and the Mauve has two Dark alleles ...

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