We do now know, however, that you have polygenetic markers associated with a condition that leaves you barren.
|
|
If these polygenetic tests are used at an early age, some doctors hope, patients can be given early preventive measures and medications to avoid heart attacks.
|
|
A polygenetic volcanic field is a group of polygenetic volcanoes, each of which erupts repeatedly, in contrast with monogenetic volcanoes, each of which erupts only once. Polygenetic volcanic fields generally occur where there is a high-level magma chamber. These volcanic fields may show lithological discontinuities due to major changes in magma chemistry, volcanotectonic events, or long erosional intervals, and may last over 10 million years. Unlike monogenetic volcanoes, polygenetic volcanoes reach massive sizes, such as Mauna Loa, which is the world's largest active volcano.
|
|
Polygenetic volcanoes include stratovolcanoes, complex volcanoes, somma volcanoes, shield volcanoes and calderas.
|
|
They may occur as a monogenetic volcanic field or a polygenetic volcanic field.
|
|
Mather K. (1941): Variation and selection of polygenetic characters. J. Genet., 41: 159.
|
|
Both volcanic (Strom, 1977) and impact-debris models (Oberbeck and others, 1977) have been proposed. The material is most likely polygenetic, including both crater and basin debris and possibly ancient volcanic flows. Physically and lithologically it resembles the lunar highlands megaregolith.
|
|
Lemei Rock is a shield volcano, and part of the Indian Heaven polygenetic volcanic field in Washington, United States. It is located midway between Mount St. Helens and Mount Adams, and dates from the Pleistocene and Holocene. Lemei Rock is the highest point at .
|
|
The assumption of polygenic inheritance is that all involved loci make an equal contribution to the symptoms of the disease. This should result in a normal curve distribution of genotypes. When it does not, the idea of polygenetic inheritance cannot be supported for that illness.
|
|
Tilocalar are two volcanoes in the Central Volcanic Zone of the Andes. They are constructed on Pleistocene ignimbrites and are afar. Tilocálar Sur () is a high polygenetic volcano and has an explosion crater one kilometre to the south. Two other craters are also present along a graben.
|
|
Source Hill is a cinder cone in northwestern British Columbia, Canada. It is polygenetic in nature, having erupted more than once throughout its eruptive history.Catalogue of Canadian volcanoes: Source Hill It is one of the volcanoes in the central portion of the Mount Edziza volcanic complex and last erupted during the Pleistocene period.
|
|
Scientific study of the volcano is also facilitated by its proximity to McMurdo Station (U.S.) and Scott Base (New Zealand), both sited on Ross Island around 35 km away. Mount Erebus is classified as a polygenetic stratovolcano. The bottom half of the volcano is a shield and the top half is a stratocone.
|
|
The setting of the village of Sete Cidades, as seen from the Boca do Inferno Belvedere, showing the crater lake Lagoa Azul and the tuff cone Lagoa do Santiago Caldeira Seca, one of the seven polygenetic cones formed during the 36,000 years of activity within the caldera The Sete Cidades volcano it situated on the extreme western portion of the island of São Miguel occupying an area of approximately and refers to a polygenetic volcano (Sete Cidades Massif) and caldera.Robert B. Moore (1990), p.603 Its subaerial volume, of about , has grown at an estimated rate of per century, beginning more than 210,000 years ago. Presently, the interior of the structure is occupied by diverse volcanic structures and four lakes.
|
|
Baldface Mountain is a conical butte-like summit in the West-Central Interior of British Columbia, Canada. It is east of Itcha Lake and northeast of the community of Anahim Lake. This mountain is a volcanic cone consisting of trachyte and phonolite. Polygenetic in nature, it was active 2.52 to 2.37 million years ago.
|
|
Monogenetic volcanism of mainly basaltic composition has been active here for millions of years accompanied by the formation of several polygenetic volcanoes, generating more than eight hundred monogenetic cones although historical eruptions have not been observed. Further south are the Chachahuen and Auca Mahuida volcanoes, while the Tromen volcano is located southwest from Payún Matrú.
|
|
Ghumura is an earthen pitcher and the imagination of the preparation of such pitcher into a musical instrument is a polygenetic development. 'Ghumura' is derived from 'Ghum+u+Ra'. 'Ghum' means bowl like pitcher made of soil or clay and having a thin face with big belly. 'U' means 'Lord Siva' and 'Ra' mean 'Raba' or 'Dhowni' (vibrating sound).
|
|
Most of these features are formed only by a single volcanic eruption and are therefore monogenetic in nature. However, in some cases several eruptions occur at a single locus to create larger, polygenetic centres (e.g. Satah Mountain, Baldface Mountain, Nazko Cone). Once activity has ended, erosion eventually reduces them into volcanic remnants such as lava plugs.
|
|
133, 137-40, 146, 175-76. Cryogenic earth hummocks appear in a variety of cold-ground environments, making the story of their genesis complex. Geologists recognize that hummocks may be polygenetic and form by a combination of forces that are yet to be well understood. Recent research on cryogenic hummocks has focused on their role as environmental indicators.
|
|
In Ireland, Hayes originated as a Gaelic polygenetic surname "O hAodha", meaning descendant of Aodh ("fire"), or of Aed, an Irish mythological god. Septs in most counties anglicised "O hAodha" to "Hayes". In County Cork, it became "O'Hea". In the province of Ulster, it became "Hughes", the patronymic of Hugh, an anglicized variant of the given name Aodh.
|
|
Olsen, F.R. and Whitmore, F.C., Jr. 1944. Machine for serial sectioning of fossils. Journal of Paleontology 18:210-215. It was a pioneering achievement in its approach and formed the basis of later work by others, in which details of cranial anatomy such as blood circulation, ear morphology, and brain configuration have been used in polygenetic studies of fossil mammals.
|
|
Instead they propose that terra rossa is polygenetic in origin and that, depending on their geographic location, their parent material, which has been altered by pedogenesis, contains exotic sediments from volcanic ash; non-limestone and non-dolomite; and aeolian sources.Sandler, A., Meunier, A., Velde, B., 2015. Mineralogical and chemical variability of mountain red/brown Mediterranean soils. Geoderma, 239–240, 156–167.
|
|
Beneath this silt lies a polygenetic puddingstone dating from the Upper Eocene Age, mixed with varicoloured clays and small pebbles of rolled silex, Jurassic cherts and quartz grains. The soils of this wine-growing terroir can be carbonate, overlying tuffeau stone on the higher slopes, or, more frequently, silicate and fairly heavy, overlying sands and clay gravels.Terroirs et vins de France. Itinéraires œnologiques et géologiques.
|
|
Sawtooth Mountain is a shield volcano, and part of the polygenetic Indian Heaven Volcanic Field in Washington, United States. It is located midway between Mount St. Helens and Mount Adams, and dates from the Pleistocene and Holocene. Sawtooth Mountain is the third highest point at in this region. The mountain forms a series of welded volcanic rock spires, an eroded remnant of an ancient shield volcano.
|
|
19 issue 5, 1980, p. 475-486. The cause of the absence of pigment differs between Siamese, white cats, and Ojos but the end result is pigment loss and blue eyes. The depth of color of the blue eyes is due to currently unknown polygenetic variations. The depth of eye color can be selected for in breeding programs and current show Siamese have extremely deep eye color.
|
|
Sete Cidades Massif is a stratovolcanic complex, referring to a polygenetic volcano and caldera, located in western part of the island of São Miguel, in the Portuguese archipelago of the Azores. More recognizable for the Lagoa das Sete Cidades at its centre, the volcanic complex includes centuries of geomorphological structures that include lava domes, cones, lava flows and maar geomorphology that have marked its history.
|
|
Since they are formed from repeated piling of liquid magma sourced from the center, they spread widely and grow upwards relatively slowly. However, West Antarctic Volcanoes form underneath ice sheets, and are thus categorized as subglacial volcanoes. Subglacial volcanoes that are monogenetic are far more narrow, steeper, flat topped structures. Polygenetic subglacial volcanoes have a wider variety of shapes and sizes due to being made up of many different eruptions.
|
|
Mess Lake Cone is a cinder cone in northwestern British Columbia, Canada. It is polygenetic in nature, having erupted more than once throughout its eruptive history.Catalogue of Canadian volcanoes: Mess Lake Mess Lake Cone is one of the volcanoes that produced young basaltic lava flows in the central portion of the Mount Edziza volcanic complex in the past 10,000 years. These basaltic lava flows form a north–south trending volcanic field called the Mess Lake Lava Field.
|
|
In contrast to common peneplain conceptualizations several pediplains might form simultaneously at different altitudes and do not necessarily grade to a base level. Pediplains are normally formed in areas of arid and semi-arid climate. As climate changes arid and semi-arid periods of pediplanation may alternate with more humid periods of etchplanation resulting in the formation of flattish surfaces (peneplains) of mixed origin (polygenetic). Cryoplanation is a variant of pediplanation that is restricted to cold climates.
|
|
Familial hemiplegic migraine (FHM) is migraine with a possible polygenetic cause—in fact, FHM can only be diagnosed when at least one close relative has it too. The patient experiences typical migraine with aura headache either preceded or accompanied with one-sided, reversible limb weakness and/or sensory difficulties and/or speech difficulties. FHM is associated with ion channel mutations. There also exists the "sporadic hemiplegic migraine" (SHM), which is the same as FHM but with no close family members showing the symptoms.
|
|
Indian Heaven features both polygenetic and monogenetic volcanic activity; many of its volcanoes have only erupted once before coming extinct, while others have erupted several times. Approximately 50 eruptive centers lie within the Indian Heaven field, which also has approximately 40 lava flows. The field's eruptive output totals , with sporadic activity taking place for the past 700,000 years. The last volcanic activity in the field produced a large cinder cone, Big Lava Bed, as well as a voluminous lava and scoria flows about 9,000 years ago.
|
|
The Laguna de Aracar Formation north of Aracar was formed by Gondwana volcanism and has been dated by K-Ar methods to be 266 ± 28 Ma old, and it is associated with the Llullaillaco Unit. Tertiary sedimentary rocks in the east and arenites in the south form the rest of the basement. The height of the volcano over the surrounding terrain is between from north to south. Aracar is a polygenetic volcanic cone with a diameter of and a rectangular basis , covering a surface area of .
|
|
The Sete Cidades Volcano at the center of the Massif consists of a caldera and a polygenetic volcanic field within it, that includes four lakes (two of which Lagoa Azul, the Blue Lake, and Lagoa Verde, the Green Lake, are linked). The caldera is almost circular and has evolved over the course of three phases. The first occurred 36,000 years ago forming the collapsed principal structure. The second phase conforms to a period approximately 29,000 years ago, when volcanic eruptions collapsed the northwest part of the structure.
|
|
The long-term erosion of cratons has been labelled the "cratonic regime". It involves processes of pediplanation and etchplanation that lead to the formation of flattish surfaces known as peneplains. While the process of etchplanation is associated to humid climate and pediplanation with arid and semi-arid climate, shifting climate over geological time leads to the formation of so-called polygenetic peneplains of mixed origin. Another result of the longevity of cratons is that they may alternate between periods of high and low relative sea levels.
|
|
Despite being together with fjords the most studied coastal landform in Norway, as of 2013 there is no consensus as to the origin of strandflats. An analysis of the literature shows that during the course of the 20th century, explanations for the strandflat shifted from involving one or two processes to including many more. Thus most modern explanations are of polygenetic type. Grand-scale observations on the distribution of strandflats tend to favour an origin in connection to the Quaternary glaciations, while in-detail studies have led scholars to argue that strandflats have been shaped by chemical weathering during the Mesozoic.
|
|
This volcanic island stands in the midst of a volcanic belt on the edge of the Indian and Burmese tectonic plates. Narcondam Island is a dormant volcano in the area, apart from volcanic seamounts like Alcock and Sewell. All the historical and recent eruptions (1789 and after) are confined within and around an active polygenetic cinder cone in a wide caldera that was formed by the Pleistocene collapse of a primitive cone of a stratovolcano. The remnant of the primitive volcanic cone forms a precipitous cliff around the island (commonly referred to as caldera wall), with a break towards the west.
|
|
Erosion of etchplains can result in the exposure of inselbergs such as bornhardt and tors. Generally the topography exposed at a stripped etchplain, that is an etch surface, after erosion of regolith is one with many irregularities as result of structurally defined areas of rock strength. A distinction can be made between etchplains and etch surfaces as the later may or may not be flat and can represent the landform arising from the stripping of an etchplain. As climate changes arid and semi-arid periods of pediplanation may alternate with more humid periods of etchplanation resulting in the formation of flattish surfaces (peneplains) of mixed origin (polygenetic).
|
|
The rest are polygenetic shield volcanoes. About 80 percent of the lava erupted by Indian Heaven volcanoes consists of basalt; it represents the most voluminous Quaternary basalt produced by a volcanic field in the Cascade Arc north of Newberry Volcano in Oregon, with an eruptive output volume between . Basalt composition varies from low-potassium high-alumina olivine tholeiite to calc- alkaline, shoshonite, and alkaline intraplate compositions, though olivine- bearing basalt with different amounts of porphyritic plagioclase dominates. Volcanoes within the field have produced smaller amounts of basaltic andesite and andesite with silicon dioxide compositions up to 59 percent, though dacite is not very common among Indian Heaven eruptive products.
|
|
Migraine is influenced on a polygenetic level (controlled by multiple genes). Therefore, researchers have theorized that migraine is a tradeoff and that it exists as a spectrum of susceptibility, with the majority of the population falling in the "heterozygous" zone between the two extremes of experiencing no headache and experiencing frequent, incapacitating headache. While it is not known for certain how or whether mild forms of the disorder would enhance survival, there is evidence of enhanced visual sensitivity in family members of migraineurs. Additionally, this compromise theory may explain the higher prevalence among women, especially pregnant women and women of reproductive age (25-40).
|
|
Many explanations have been proposed for honeycomb and other cavernous weathering. These explanations include marine abrasion; wind corrosion; mechanical weathering resulting from short-term temperature variations; chemical weathering of the interior of the rock (core-softening) under a protective crust (case-hardening) followed by mechanical removal of the softened material; biogeochemical weathering by lichens; temperature variations acting on salt efflorescence in coastal regions; and salt weathering. Most commonly, researchers have advocated salt weathering as the primary explanation for the formation of honeycomb weathering. Currently, it is considered to be polygenetic in origin; being the result of complex interaction of physical and chemical weathering processes, which include salt weathering and cyclic wetting and drying.
|
|
Subsequent weathering processes of very different forms and simultaneous complex deposition (leaching, frost and salt wedging, wind, solution weathering with sintering as well as biogenic and microbial effects) have further changed the nature of the rock surface. For example, collapse caves, small hole-like cavities (honeycomb weathering) with hourglass-shaped pillars (Sanduhr), chimneys, crevices and mighty, rugged rock faces. Many morphological formations in the rocky landscape of the Elbe Sandstone Mountains are suspected to have been formed as a consequence of karstification. Important indicators of such processes in the polygenetic and polymorphic erosion landscape of the Elbe Sandstone Mountains are the furrows with parallel ridges between them (grykes and clints) that look like cart ruts and which are particularly common, as well as extensive cave systems.
|
|
This work led to a classification of deltas highlighting the constructive role of waves and to the discovery of an asymmetric (polygenetic) end-member. These advances, together with novel ideas on river mouth morphodynamics, inspired approaches to numerically model river delta evolution and architecture. After producing the first accurate evolution model of the Danube Delta, Giosan explored the dramatic effects of early deforestation on the Danube and Black Sea as a type example of how humans have unintentionally affected the coastal ocean for millennia. Together with colleagues spanning disciplines from paleogenetics to engineering, he linked the rapid growth of the Danube delta in the last 2000 years to deforestation that started under the Roman Empire and accelerated during the Ottoman Empire's expansion in Europe.
|
|
At least three types of volcanic zones are present in the Northern Cordilleran Volcanic Province, including large persistent lava plateaus like those found at the Mount Edziza volcanic complex, polygenetic volcanoes such as Hoodoo Mountain and monogenetic volcanoes like the basaltic cinder cones found throughout the volcanic province. When Northern Cordilleran volcanoes do erupt, pyroclastic flows, lava flows and landslides can devastate areas away and mudflows of volcanic ash and debris can inundate valleys downstream. Falling ash from explosive eruptions can disrupt human activities hundreds of kilometres downwind, and drifting clouds of fine volcanic ash can cause severe damage to jet aircraft even hundreds of kilometres away. Volcanic deposits in the Northern Cordilleran Volcanic Province include lava flows, welded and unwelded pyroclastic deposits, hydroclastic deposits and other ice-contact volcanic deposits.
|
|
He argued instead multiple individuals in each species were created at the same time and then distributed throughout the continents where God meant for them to dwell. His lectures on polygenism were popular among the slaveholders in the South, for many this opinion legitimized the belief in a lower standard of the Negro. His stance in this case was considered to be quite radical in its time, because it went against the more orthodox and standard reading of the Bible in his time which implied all human stock descended from a single couple (Adam and Eve), and in his defense Agassiz often used what now sounds like a very "modern" argument about the need for independence between science and religion; though Agassiz, unlike many polygeneticists, maintained his religious beliefs and was not anti-Biblical in general. In the context of ethnology and anthropology of the mid-19th century, Agassiz's polygenetic views became explicitly seen as opposing Darwin's views on race, which sought to show the common origin of all human races and the superficiality of racial differences.
|
|
According to Max Muller, This monocausal hypothesis has now been generally discarded in favor of polygenetic hypothesis which states that fable motifs had independent origins in many ancient human cultures, some of which have common roots and some influenced by co-sharing of fables. The shared fables implied morals that appealed to communities separated by large distances and these fables were therefore retained, transmitted over human generations with local variations. However, many post-medieval era authors explicitly credit their inspirations to texts such as "Bidpai" and "Pilpay, the Indian sage" that are known to be based on the Panchatantra. According to Niklas Bengtsson, even though India being the exclusive original source of fables is no longer taken seriously, the ancient classic Panchatantra, "which new folklore research continues to illuminate, was certainly the first work ever written down for children, and this in itself means that the Indian influence has been enormous [on world literature], not only on the genres of fables and fairy tales, but on those genres as taken up in children's literature".
|
|