Search results
Results From The WOW.Com Content Network
The double-factor Dominant Clearbody, with two Dominant Clearbody alleles, is believed to have a clearer body and darker wing markings than the single-factor Dominant Clearbody. The Dominant Clearbody gene is located on one of the autosomal chromosomes. There is no known linkage of this gene with any other mutation.
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 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 World Budgerigar Organisation has established precise standards for some budgerigar body colours using the Pantone Codes, as shown to the right for the Lutino. The Ino mutation also induces changes in the nestling. The down is white rather than grey and appears only sparsely, never growing down the centre of the back.
It is a further mutation of the ino locus with the symbol ino cl. Together with the Ino mutation, it forms a series of multiple alleles. The order of dominance is ino +, ino cl, ino, with ino being the most recessive. Mutations which are allelic to Ino and cause partial albinism are known as Par-ino mutations in parrot species. [5]
The Greywing is an autosomal mutation of the dil locus with the symbol dil gw, and so is a member of the multiple allelic series which also includes the Dilute (dil d) and Clearwing (dil cw) mutations. [8] The Greywing allele is recessive to the wild-type, dominant over the Dilute allele and co-dominant with the Clearwing allele.
The English Grey variety is very similar in appearance to the Dominant Grey.The original reports described the English Grey in the Blue series as being slate grey with a dark grey to black rump, a white mask carrying black or almost black spots and dark grey, bordering on black, cheek patches, black and white wings and an intense black tail. [1]
The Yellowface Blue I mutation, the Yellowface II mutation form an autosomal co-dominant series of alleles with the Blue mutation. [6] [7] 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).