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Given a passage and a query based on the passage, generate an unambiguous, concise and simple answer to the query from information in the passage. Note that the answer may not be present in exact form.
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Children with mosaic Down syndrome may have the same features as other children with Down syndrome. However, they may have fewer features of the condition due to the presence of some (or many) cells with a typical number of chromosomes. Down syndrome is a set of physical and mental traits caused by a gene problem that happens before birth. Children who have Down syndrome tend to have certain features, such as a flat face and a short neck. Chromosomes R Us - English (Video) This is a short film by actors with Down syndrome explaining how Trisomy 21 occurs. Made by Shabang Inclusive Learning in collaboration with Mediapreview. Huddersfield, West Yorkshire, UK. This film was made possible by generous funding from BBC Children in Need. Down syndrome can be diagnosed in infancy based on the characteristic clinical findings. When Down syndrome is suspected in a person, a genetic test called a chromosome analysis is performed on a blood or skin sample to look for an extra chromosome 21 (trisomy 21). Trisomy 21 means that each cell in the body has three copies of chromosome 21 instead of the usual two copies. Having an extra number 21 chromosome interrupts the normal course of development, causing the characteristic clinical features of Down syndrome. Down syndrome can be caused by one of three types of abnormal cell division involving chromosome 21. The three genetic variations include: Trisomy 21 More than 90% of Down syndrome cases are caused by trisomy 21. An extra chromosome (chromosome 21) originates in the development of either the sperm or the egg. When the egg and the sperm unite to form the fertilized egg, three (rather than two) chromosomes 21 are present. Any one of three genetic variations can cause Down syndrome: Trisomy 21. About 95 percent of the time, Down syndrome is caused by trisomy 21 the person has three copies of chromosome 21, instead of the usual two copies, in all cells. This is caused by abnormal cell division during the development of the sperm cell or the egg cell. Mosaic Down syndrome. You may decide to have: 1 Screening tests, such as an ultrasound or a blood test during your first or second trimester. These can help show if the developing baby (fetus) is at risk for Down syndrome. 2 Diagnostic tests, such as chorionic villus sampling or amniocentesis. These can show if a baby has Down syndrome. Down Syndrome Causes and Symptoms. Down syndrome is a genetic disorder in which, most often, a third copy of chromosome 21 is present in cells because of an abnormal cell division when the egg and sperm first meet. The complications of living with Down syndrome can range in severity to mild to extreme and may include the following: 1 Thyroid disease. 2 Heart defects. 3 Infectious diseases. 4 Sleep apnea. 5 Obesity. 6 Seizures. 7 Hearing loss. 8 Premature aging. 9 Skeletal problems. 10 Inability to care for one's self. The risk for someone with tranlocation trisomy 21 passing on the condition to a child is roughly 10 to 15 percent for women and three percent for men. Since translocation trisomy 21 only accounts for around four percent of people with Down syndrome, less than one percent of cases would be considered hereditary. Query: how does down syndrome caused
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Down syndrome can be caused by one of three types of abnormal cell division involving chromosome 21. The three genetic variations include: Trisomy 21 More than 90% of Down syndrome cases are caused by trisomy 21. An extra chromosome (chromosome 21) originates in the development of either the sperm or the egg. When the egg and the sperm unite to form the fertilized egg, three (rather than two) chromosomes 21 are present.

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The energy imbalance will continue to grow, and surface temperatures will continue to rise. 1 References. 2 Cahalan, R. (n.d.) Solar and Earth Radiation. 3 Hansen, J., Nazarenko, L., Ruedy, R., Sato, M., Willis, J., Del Genio, A., Koch, D., Lacis, A., Lo, K., Menon, S., Novakov, T., Perlwitz, J., Russell, G., Schmidt, G.A., and Tausnev, N. (2005). In addition to the induced changes in water vapor content there are three other (direct) sources of anthropogenic water vapor: 1 1. Evaporation and transpiration losses from farming and the watering of lawns and landscapes. 2 2. Evaporation losses from canals and artificial lakes including the reservoirs behind dams. The absorption of most of the outgoing thermal radiation by water vapor creates most of Earth's natural greenhouse effect - an effect that is now being increased by human pollution. Without the atmospheric water vapor Earth's surface would be, on average, about 31C (55F) colder than it is now and the differences in temperature between high and low altitudes and between the poles and equator would be smaller. Climate change intensifies this cycle because as air temperatures increase, more water evaporates into the air. Warmer air can hold more water vapor, which can lead to more intense rainstorms, causing major problems like extreme flooding in coastal communities around the world. <<Related: A Thirst for Power: The Water Energy Nexus>> Water vapour is the most abundant greenhouse gas in the atmosphere, yet other greenhouse gases (such as carbon dioxide and methane) are often portrayed as the main drivers of climate change. If we did not have water vapor and the trace gases the earth would be much colder because the oxygen, nitrogen, and argon would not prevent the loss of infrared to space. http://en.wikiped...of_Earth Water vapor is the primary greenhouse gas in the atmosphere but it is limited in altitude (due to condensation) and variable (due to the ability to condense with drops in temperature or changes in pressure). Water vapor is another greenhouse gas that keeps heat from the sun trapped in the Earth's atmosphere and helps maintain a temperature at which life can flourish on our planet. However, deforestation also affects the amount of this in the air. Air is a mixture of gases, which includes nitrogen, oxygen, carbon dioxide and water vapor (water in its gas form). Humidity refers to the amount of water vapor in air. All air contains at least some water vapor, but the amount of water vapor changes a lot from place to place and from time to time. Studies have shown that deforestation has contributed to the amount of water vapor in the air and, over just a few years, the amount of water vapor present has increased by four percent. Besides increasing the temperature of the Earth's surface and atmosphere, this also has knock-on effects for weather patterns. Water Cycle Water Vapor is the most abundant greenhouse gas in the atmosphere [] However, changes in its conentration is also considered to be a result of climate feedbacks related to the warming of the atmosphere rather than a direct result of industrialization. Query: how does water vapor affect climate
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Water vapor is another greenhouse gas that keeps heat from the sun trapped in the Earth's atmosphere and helps maintain a temperature at which life can flourish on our planet. However, deforestation also affects the amount of this in the air.

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They mostly stay underwater for 3 to 8 minutes. However, longer periods of up to 30 minutes 50 to 80 minutes A:a whale can stay under water for more than a hour. it can stay in water for about 50-80 minutes. Up to 30 min. The Sperm whale can hold its breath for up to 90 minutes. Human beings can hold their breath under water for an average of one minute. A hippopotamus can stay underwater for 15 minutes. The sperm whale and bottlenose whale can stay underwater the longest: some have been recorded on dives that lasted nearly two hours. a blue whale can reportedly hold it breath for up to 20 minutes. How long whales stay under water during normal feeding dives and how long. they can stay under water if they have to is quite different. Blue whales can. a blue whale can reportedly hold it breath for up to 20 minutes.How long whales stay under water during normal feeding dives and how longthey can stay. just now. 1 My whale can stay underwater indefinitely, it's just a toy. 2 My whale stays in the shower until the hot water runs out. 3 The average length of a killer whales' dive is about 10 minutes with a max dive time of about 15 minutes. 4 a whale can stay under water for 1-2.5 hours. 5 1-2 hours. 6 I have never timed my whale when it is underwater. a blue whale can reportedly hold it breath for up to 20 minutes. How long whales stay under water during normal feeding dives and how long they can stay under water if they have to is quite different. Blue whales can stay submerged for about 40 min but their dive lengths are more on the order of 10-15 min. Hope this helped! Best Answer: It depends on the type of whale. Killer whales can hold their breath for about 20 minutes while Sperm whales can hold their breath for over an hour! If the whale is a deep-diving whale, it can typically hold it's breath longer than more shallow diving whales. Also, dolphins (a killer whale is the largest in the dolphin family) can't hold their breath as long as true whales. They mostly stay underwater for 3 to 8 minutes. However, longer periods of up to 30 minutes 50 to 80 minutes A:a whale can stay under water for more than a hour. it can stay i n water for about 50-80 minutes. Up to 30 min. The Sperm whale can hold its breath for up to 90 minutes. My whale can stay underwater indefinitely, it's just a toy. live whales on the other hand can stay under until they need to take a breath, or until they drown, after which they'll float back to the surface temporarily. I don't know if you realized but there are many different species of whale. My whale stays in the shower until the hot water runs out. The average length of a killer whales' dive is about 10 minutes with a max dive time of about 15 minutes. a whale can stay under water for 1-2.5 hours I can only stay underwater for 1 minute. 1-2 hours. I have never timed my whale when it is underwater. Query: how long can a blue whale stay underwater
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A blue whale can stay for up to 20 minutes in underwater.