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Japanese House Mouse
The Japanese house mouse or Japanese wild mouse (''Mus musculus molossinus'') is a type of house mouse that originated in Japan. Genetically, it is a hybrid between the southeastern Asian house mouse ('' M. m. castaneus'') and the eastern European house mouse ('' M. m. musculus''). It is thus not a unique subspecies, but is treated as such for its characteristic features. It is among the smallest house mice. Different strains such as MSM/Ms, JF1, Japanese waltzing mouse, C57BL/6J and MSKR exist following cross breeding with other house mice, and are used in different genetic and medical investigations. Description The adults can be easily distinguished from common laboratory mice from their size and body colours. They are slightly smaller, and they have characteristic two-coloured body, agouti with white bellies. The two colours are not marked by a distinct margin but fused as the colour fades. The tail is also bi-coloured, white with a black tip. Adult females measure 8.1 cm in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carl Linnaeus
Carl Linnaeus (; 23 May 1707 – 10 January 1778), also known after his ennoblement in 1761 as Carl von Linné Blunt (2004), p. 171. (), was a Swedish botanist, zoologist, taxonomist, and physician who formalised binomial nomenclature, the modern system of naming organisms. He is known as the "father of modern taxonomy". Many of his writings were in Latin; his name is rendered in Latin as and, after his 1761 ennoblement, as . Linnaeus was born in Råshult, the countryside of Småland, in southern Sweden. He received most of his higher education at Uppsala University and began giving lectures in botany there in 1730. He lived abroad between 1735 and 1738, where he studied and also published the first edition of his ' in the Netherlands. He then returned to Sweden where he became professor of medicine and botany at Uppsala. In the 1740s, he was sent on several journeys through Sweden to find and classify plants and animals. In the 1750s and 1760s, he continued to collect an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hearing Loss
Hearing loss is a partial or total inability to Hearing, hear. Hearing loss may be present at birth or acquired at any time afterwards. Hearing loss may occur in one or both ears. In children, hearing problems can affect the ability to Language acquisition, acquire spoken language, and in adults it can create difficulties with social interaction and at work. Hearing loss can be temporary or permanent. Presbycusis, Hearing loss related to age usually affects both ears and is due to cochlear hair cell loss. In some people, particularly older people, hearing loss can result in loneliness. Deafness, Deaf people usually have little to no hearing. Hearing loss may be caused by a number of factors, including: genetics, ageing, Noise-induced hearing loss, exposure to noise, some infections, birth complications, trauma to the ear, and certain medications or toxins. A common condition that results in hearing loss is chronic ear infections. Certain infections during pregnancy, such as cyt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Naomi Mitchison
Naomi Mary Margaret Mitchison, Baroness Mitchison (; 1 November 1897 – 11 January 1999) was a Scottish novelist and poet. Often called a doyenne of Scottish literature, she wrote over 90 books of historical and science fiction, travel writing and autobiography. Her husband Dick Mitchison's life peerage in 1964 entitled her to call herself Lady Mitchison, but she never did. Her 1931 work, ''The Corn King and the Spring Queen'', is seen by some as the prime 20th-century historical novel. Childhood and family background Naomi Mary Margaret Haldane was born in Edinburgh, the daughter and younger child of the physiologist John Scott Haldane and his wife (Louisa) Kathleen Trotter. Naomi's parents came from different political backgrounds, her father being a Liberal and her mother from a Conservative, pro-imperialist family. However, both were of landed stock; the Haldane family had been feudal barons of Gleneagles since the 13th century. Today the best-known member of the family i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arthur Dukinfield Darbishire
Arthur Dukinfield Darbishire FRSE (14 February 1879 – 26 December 1915) was a short-lived but influential British zoologist and geneticist. He was the first person to lecture in Genetics in the UK. He caused a stir in the world of genetics in the early 20th century in the debate over theory, sometimes referred to as The Mendel Wars. From 1901 he conducted a series of experiments (working under Raphael Weldon) on the hybridisation of mice in the laboratory. He was author of the highly influential book ''Breeding and the Mendelian Discovery''. Life He was born in Kensington in London on 14 February 1879, the son of Florence Eckersley (1848–1917) and Dr Samuel Dukinfield Darbishire (1846–1892). Soon the family moved to Oxford, where his father was appointed Physician at the Radcliffe Infirmary. In 1881, the family are listed as living at 15 New Inn Hall Street with four servants. In 1888 his father took early retirement on health grounds and the family moved to Plas Mawr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mendel's Laws
Mendelian inheritance (also known as Mendelism) is a type of biological inheritance following the principles originally proposed by Gregor Mendel in 1865 and 1866, re-discovered in 1900 by Hugo de Vries and Carl Correns, and later popularized by William Bateson. These principles were initially controversial. When Mendel's theories were integrated with the Boveri–Sutton chromosome theory of inheritance by Thomas Hunt Morgan in 1915, they became the core of classical genetics. Ronald Fisher combined these ideas with the theory of natural selection in his 1930 book ''The Genetical Theory of Natural Selection'', putting evolution onto a mathematical footing and forming the basis for population genetics within the modern evolutionary synthesis. History The principles of Mendelian inheritance were named for and first derived by Gregor Johann Mendel, a nineteenth-century Moravian monk who formulated his ideas after conducting simple hybridisation experiments with pea plants (' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Waltz
The waltz ( ), meaning "to roll or revolve") is a ballroom and folk dance, normally in triple ( time), performed primarily in closed position. History There are many references to a sliding or gliding dance that would evolve into the waltz that date from 16th-century Europe, including the representations of the printmaker Hans Sebald Beham. The French philosopher Michel de Montaigne wrote of a dance he saw in 1580 in Augsburg, where the dancers held each other so closely that their faces touched. Kunz Haas (of approximately the same period) wrote, "Now they are dancing the godless ''Weller'' or ''Spinner''."Nettl, Paul. "Birth of the Waltz." In ''Dance Index'' vol 5, no. 9. 1946 New York: Dance Index-Ballet Caravan, Inc. pages 208, 211 "The vigorous peasant dancer, following an instinctive knowledge of the weight of fall, uses his surplus energy to press all his strength into the proper beat of the bar, thus intensifying his personal enjoyment in dancing." Around 1750, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mendelian Inheritance
Mendelian inheritance (also known as Mendelism) is a type of biological inheritance following the principles originally proposed by Gregor Mendel in 1865 and 1866, re-discovered in 1900 by Hugo de Vries and Carl Correns, and later popularized by William Bateson. These principles were initially controversial. When Mendel's theories were integrated with the Boveri–Sutton chromosome theory of inheritance by Thomas Hunt Morgan in 1915, they became the core of classical genetics. Ronald Fisher combined these ideas with the theory of natural selection in his 1930 book ''The Genetical Theory of Natural Selection'', putting evolution onto a mathematical footing and forming the basis for population genetics within the modern evolutionary synthesis. History The principles of Mendelian inheritance were named for and first derived by Gregor Johann Mendel, a nineteenth-century Moravian monk who formulated his ideas after conducting simple hybridisation experiments with pea plants (' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Allele
An allele (, ; ; modern formation from Greek ἄλλος ''állos'', "other") is a variation of the same sequence of nucleotides at the same place on a long DNA molecule, as described in leading textbooks on genetics and evolution. ::"The chromosomal or genomic location of a gene or any other genetic element is called a locus (plural: loci) and alternative DNA sequences at a locus are called alleles." The simplest alleles are single nucleotide polymorphisms (SNP). but they can also be insertions and deletions of up to several thousand base pairs. Popular definitions of 'allele' typically refer only to different alleles within genes. For example, the ABO blood grouping is controlled by the ABO gene, which has six common alleles (variants). In population genetics, nearly every living human's phenotype for the ABO gene is some combination of just these six alleles. Most alleles observed result in little or no change in the function of the gene product it codes for. However, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Piebald
A piebald or pied animal is one that has a pattern of unpigmented spots (white) on a pigmented background of hair, feathers or scales. Thus a piebald black and white dog is a black dog with white spots. The animal's skin under the white background is not pigmented. Location of the unpigmented spots is dependent on the migration of melanoblasts (primordial pigment cells) from the neural crest to paired bilateral locations in the skin of the early embryo. The resulting pattern appears symmetrical only if melanoblasts migrate to both locations of a pair and proliferate to the same degree in both locations. The appearance of symmetry can be obliterated if the proliferation of the melanocytes (pigment cells) within the developing spots is so great that the sizes of the spots increase to the point that some of the spots merge, leaving only small areas of the white background among the spots and at the tips of the extremities. Animals with this pattern may include birds, cats, cattl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dominance (genetics)
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] |
Introgression
Introgression, also known as introgressive hybridization, in genetics is the transfer of genetic material from one species into the gene pool of another by the repeated backcrossing of an interspecific hybrid with one of its parent species. Introgression is a long-term process, even when artificial; it may take many hybrid generations before significant backcrossing occurs. This process is distinct from most forms of gene flow in that it occurs between two populations of different species, rather than two populations of the same species. Introgression also differs from simple hybridization. Simple hybridization results in a relatively even mixture; gene and allele frequencies in the first generation will be a uniform mix of two parental species, such as that observed in mules. Introgression, on the other hand, results in a complex, highly variable mixture of genes, and may only involve a minimal percentage of the donor genome. Definition Introgression or introgressive hybri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fancy Mouse
A fancy mouse (''Mus musculus domestica'') is a domesticated form of the house mouse (''Mus musculus''), one of many mice species, usually kept as a type of pocket pet. Fancy mice have also been specially bred for exhibiting, with shows being held internationally. A pet mouse is inexpensive compared to larger pets, and even many other pet rodents, but mice are comparatively short-lived: typically only 2 to 3 years. Description The term ''fancy mouse'' is used to describe a mouse that has been selectively bred for exhibition. Wild-caught specimens that become docile and are bred for many generations still fall under the ''fancy'' type. Fancy mice can vary greatly in size, from small pet mice that are approximately long from nose to the proximal start of the tail, to show mice that measure nose to tail. Pet mice weigh about but large show mice can weigh up to . Varieties Artificial selection in fancy mice has created numerous available fur colours. These include colours l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
