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The original mutation is thought to have originated in a colony aviary in Texas around 1955. [2] In 1958 Gay Terraneo of Wilmington and Mr John Papin of Long Beach , both in California, obtained respectively a pair and a hen, and showed that the mutation is a sex-linked recessive.
The science of budgerigar color genetics deals with the heredity of mutations which cause color variation in the feathers of the species known scientifically as Melopsittacus undulatus. Birds of this species are commonly known by the terms 'budgerigar', or informally just 'budgie'.
The Clearflight Pied budgerigar mutation is one of approximately 30 mutations affecting the colour of budgerigars. It is the underlying mutation of the Continental Clearflight and Dutch Pied varieties. The Dark-eyed Clear variety results when the Recessive Pied and Clearflight Pied characters are combined. [1] [2]
The alternative name of this mutation, 'Easley Clearbody', comes from the name of the breeder who discovered and established the mutation: C F Easley of Rialto, California. He has described in detail [3] how this mutation, which he called 'Laced Clear', arose and was established. In January 1957 he paired an Opaline Dark Green cock to a Cobalt ...
The loci of the Dark budgerigar mutation and the Blue allelic series are situated on the same autosome, so the Dark mutation is linked to the Blue allelic series (see genetic linkage). The cross-over value (COV) or recombination frequency between the Dark and Blue loci is commonly stated to be about 14%, [ 8 ] but some experiments have found ...
When combined with the Dark mutation the body colour of both Greys and Grey-Greens becomes slightly darker, but the effect is much smaller than the effect of the Dark mutation on Light Greens and Skyblues. As this is a dominant mutation the colour changes described above apply to both single factor (SF) and double factor (DF) Greys and Grey-Greens.
The greater the mutation, the less likely that your immune system will recognize and fight back against the disease. Every now and then, the virus changes dramatically in a process called ...
The Clearwing budgerigar mutation is one of approximately 30 mutations affecting the colour of budgerigars. It is the underlying mutation of the Clearwing variety, often known as Yellowwings in the green series and Whitewings in the blue series. When combined with the Greywing mutation the variety is known as the Full-bodied Greywing.