Dilute Budgerigar Mutation - Genetics


The Dilute mutation is recessive to its wild-type allele, so a bird possessing a single Dilute allele (the heterozygote) is identical in appearance to the wild-type Light Green. That is, the presence of a single wild-type allele is sufficient to permit the production of the normal number of melanin granules. Among the budgerigar fancy such a bird is said to be a Light Green split dilute, usually written Light Green/dilute, although Light Green/yellow has been used.

In a bird which has two Dilute alleles (the homozygote) the number of melanin granules is greatly reduced, to around 5% of the normal amount. This results in a much reduced intensity of the black markings, and less absorption of light which passes through the cloudy layer in the medulla of barbs. As this absorption of light is a necessary part of the process which generates the blue colouration the intensity of blue is also greatly reduced.

The Dilute mutation is one of a series of multiple alleles at the same locus, called dil+ in the wild-type. The others are the Clearwing (dilcw) and Greywing (dilgw) mutations. The Dilute allele (dild) is recessive to all other alleles at this locus, so for the Dilute character to be expressed in the phenotype the genotype must be homozygous for this allele.

Read more about this topic:  Dilute Budgerigar Mutation

Other articles related to "genetics, genetic":

Management Of Baldness - Research - Genetics
2008 researchers at the University of Bonn announced they have found the genetic basis of two distinct forms of inherited hair loss, opening a broad path to treatments for baldness ... to scientists and they are now attempting to gather more genetic and biological data ...
Genetics - Research and Technology - DNA Sequencing and Genomics
... One of the most fundamental technologies developed to study genetics, DNA sequencing allows researchers to determine the sequence of nucleotides in DNA fragments ...
Personalized Medicine - Background
... Advances in medical genetics and human genetics have enabled a more detailed understanding of the impact of genetics in disease ... SNPs) that account for some of the genetic variability between individuals, and made possible the use of genome-wide association studies (GWAS) to examine genetic variation and ... It is hoped that recent advancements in the genetic etiologies of common diseases will improve pharmaceutical development ...
Giuseppe Sermonti - Biography - Early Life and Career
... Born in Rome, graduated in agriculture and genetics, he entered the Superior Institute of Health in 1950, founding a department of Microbiological Genetics ... He became professor of genetics at the University of Camerino, then at the University of Palermo in 1965, and finally moved to the University of Perugia in 1970, where he is presently emeritus professor ... He is the discoverer of the genetic parasexual recombination in antibiotic-producing Penicillium and Streptomyces ...
A. W. F. Edwards - Publications - Selected Papers
... Genetics Today 3923–933 ... American Journal of Human Genetics 19233–257 ... Genetics 1541419–1426 ...