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Ino Budgerigar Mutation
The Ino budgerigar mutation is one of approximately 30 mutations affecting the colour of budgerigars. It is the underlying mutation of the Albino and Lutino varieties and, with Cinnamon budgerigar mutation, Cinnamon, a constituent mutation of the Lacewing variety. Appearance In the green series the Ino is known as the Lutino, with pure yellow contour feathers, white or pale yellow flight feathers and tail feathers and silvery-white cheek patches. In some lights the body can show a very pale green sheen.Watmough, W (1951) p48 In the blue series the Ino is known as the Albino, and is pure white throughout. The cheek patches are almost the same colour as the body, but slightly more silvery. In some lights the body can show a very pale blue sheen. The eyes of both the Lutino and Albino are red at all ages with white Iris (anatomy), irides when adult, the beak is orange and the feet and legs are pink. The cere of an adult Ino cock is greyish-purple rather than blue. The Worl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Budgerigar
The budgerigar ( ; ''Melopsittacus undulatus''), also known as the common parakeet or shell parakeet, is a small, long-tailed, seed-eating parrot usually nicknamed the budgie ( ), or in American English, the parakeet. Budgies are the only species in the genus ''Melopsittacus''. Naturally, the species is green and yellow with black, scalloped markings on the nape, back, and wings. Budgies are bred in captivity with colouring of blues, whites, yellows, greys, and even with small crests. Juveniles and chicks are monomorphic, while adults are told apart by their cere colouring, and their behaviour. The species is the only member of the genus ''Melopsittacus'', which is the only genus in the Melopsittacini tribe. The origin of the budgerigar's name is unclear. First recorded in 1805, budgerigars are popular pets around the world due to their small size, low cost, and ability to mimic human speech. They are likely the third most popular pet in the world, after the domesticated d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ZW Sex-determination System
The ZW sex-determination system is a chromosomal system that determines the sex of offspring in birds, some fish and crustaceans such as the giant river prawn, some insects (including butterflies and moths), the schistosome family of flatworms, and some reptiles, e.g. majority of snakes, lacertid lizards and monitors including Komodo dragons. It is also used in some plants where it has probably evolved independently on several occasions. The letters Z and W are used to distinguish this system from the XY sex-determination system. In this system, females have a pair of dissimilar ZW chromosomes, and males have two similar ZZ chromosomes. In contrast to the XY sex-determination system and the X0 sex-determination system, where the sperm determines the sex, in the ZW system, the ovum determines the sex of the offspring. Males are the homogametic sex (ZZ), while females are the heterogametic sex (ZW). The Z chromosome is larger and has more genes, like the X chromosome in the XY sys ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Recessive
In genetics, dominance is the phenomenon of one variant (allele) of a gene on a chromosome masking or overriding the effect of a different variant of the same gene on the other copy of the chromosome. The first variant is termed dominant and the second recessive. This state of having two different variants of the same gene on each chromosome is originally caused by a mutation in one of the genes, either new (''de novo'') or inherited. The terms autosomal dominant or autosomal recessive are used to describe gene variants on non-sex chromosomes ( autosomes) and their associated traits, while those on sex chromosomes (allosomes) are termed X-linked dominant, X-linked recessive or Y-linked; these have an inheritance and presentation pattern that depends on the sex of both the parent and the child (see Sex linkage). Since there is only one copy of the Y chromosome, Y-linked traits cannot be dominant or recessive. Additionally, there are other forms of dominance such as incomplete d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sex-linked
Sex linked describes the sex-specific patterns of inheritance and presentation when a gene mutation (allele) is present on a sex chromosome (allosome) rather than a non-sex chromosome ( autosome). In humans, these are termed X-linked recessive, X-linked dominant and Y-linked. The inheritance and presentation of all three differ depending on the sex of both the parent and the child. This makes them characteristically different from autosomal dominance and recessiveness. There are many more X-linked conditions than Y-linked conditions, since humans have several times as many genes on the X chromosome than the Y chromosome. Only females are able to be carriers for X-linked conditions; males will always be affected by any X-linked condition, since they have no second X chromosome with a healthy copy of the gene. As such, X-linked recessive conditions affect males much more commonly than females. In X-linked recessive inheritance, a son born to a carrier mother and an unaffected fat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hanover
Hanover (; german: Hannover ; nds, Hannober) is the capital and largest city of the German state of Lower Saxony. Its 535,932 (2021) inhabitants make it the 13th-largest city in Germany as well as the fourth-largest city in Northern Germany after Berlin, Hamburg and Bremen. Hanover's urban area comprises the towns of Garbsen, Langenhagen and Laatzen and has a population of about 791,000 (2018). The Hanover Region has approximately 1.16 million inhabitants (2019). The city lies at the confluence of the River Leine and its tributary the Ihme, in the south of the North German Plain, and is the largest city in the Hannover–Braunschweig–Göttingen–Wolfsburg Metropolitan Region. It is the fifth-largest city in the Low German dialect area after Hamburg, Dortmund, Essen and Bremen. Before it became the capital of Lower Saxony in 1946, Hannover was the capital of the Principality of Calenberg (1636–1692), the Electorate of Hanover (1692–1814), the Kingdom of Hannover ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arnum
Hemmingen () is a town in the district of Hanover, in Lower Saxony, Germany. It is situated approximately 6 km south of Hanover. Until December 2004, Hemmingen belonged to the Regierungsbezirk Hannover, which was dissolved in January 2005. Districts Hemmingen is divided into 7 districts: * Arnum * Devese * Harkenbleck * Hemmingen-Westerfeld * Hiddestorf * Ohlendorf * Wilkenburg Education Hemmingen has 3 primary schools and one comprehensive school. Twin towns – sister cities Hemmingen is twinned with: * Murowana Goślina, Poland * South Lanarkshire, Scotland, United Kingdom * Yvetot Yvetot () is a commune in the Seine-Maritime department in the Normandy region in northern France. It is the capital of the Caux region. History The name Yvetot comes from the Germanic ''Yvo'' and the Old Norse ''-topt''. Therefore, Yvetot means ..., France References External links * Hanover Region {{Hanover-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Horsham
Horsham is a market town on the upper reaches of the River Arun on the fringe of the Weald in West Sussex, England. The town is south south-west of London, north-west of Brighton and north-east of the county town of Chichester. Nearby towns include Crawley to the north-east and Haywards Heath and Burgess Hill to the south-east. It is the administrative centre of the Horsham district. History Governance Horsham is the largest town in the Horsham District Council area. The second, higher, tier of local government is West Sussex County Council, based in Chichester. It lies within the ancient Norman administrative division of the Rape of Bramber and the Hundred of Singlecross in Sussex. The town is the centre of the parliamentary constituency of Horsham, recreated in 1983. Jeremy Quin has served as Conservative Member of Parliament for Horsham since 2015, succeeding Francis Maude, who held the seat from 1997 but retired at the 2015 general election. Geography Weat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Warwick
Warwick ( ) is a market town, civil parish and the county town of Warwickshire in the Warwick District in England, adjacent to the River Avon. It is south of Coventry, and south-east of Birmingham. It is adjoined with Leamington Spa and Whitnash. It has ancient origins and an array of historic buildings, notably from the Medieval, Stuart and Georgian eras. It was a major fortified settlement from the early Middle Ages, the most notable relic of this period being Warwick Castle, a major tourist attraction. Much was destroyed in the Great Fire of Warwick in 1694 and then rebuilt with fine 18th century buildings, such as the Collegiate Church of St Mary and the Shire Hall. The population was estimated at 37,267 at the 2021 Census. History Neolithic Human activity on the site dates back to the Neolithic, when it appears there was a sizable settlement on the Warwick hilltop. Artifacts found include more than 30 shallow pits containing early Neolithic flints and pottery an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rugeley
Rugeley ( ) is a market town and civil parish in the Cannock Chase District in Staffordshire, England. It lies on the north-eastern edge of Cannock Chase next to the River Trent; it is situated north of Lichfield, south-east of Stafford, north-east of Hednesford and south-west of Uttoxeter. At the 2021 Census, the population was 24,386. Rugeley is twinned with Western Springs, Illinois and, in July 1962, the towns made telephone history on national television when the chairman of Rugeley Urban District Council made the first telephone call via the new Telstar satellite to the Mayor of Western Springs. It was also featured in an article about workers' rights and town transformation in the 21st century. History The town, historically known as Rudgeley or Ridgeley, is listed in the Domesday Book of 1086. This name is thought to be derived from 'Ridge lee', or 'the hill over the field'. In the mediaeval period, it thrived on iron workings and was also a site of glass manufac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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