What is down syndrome. What are the symptoms and causes of down syndrome
Down syndrome is also called DS or DNS. This is also known as trisomy 21 which is mainly a genetic disorder what produced by the attendance of all or part of a third copy of chromosome 21.This is typically related with physical growth interruptions, characteristic facial features and mild to moderate intellectual disability. It is found that the average IQ of a young adult with Down syndrome is 50, similar to the mental ability of an 8- or 9-year-old child, but it can also vary extensively. The parents of the pretentious individual are typically genetically normal. The extra chromosome happen by chance. Down syndrome is an exclusive individual and may also possess these features to dissimilar degrees, or not at all.
The person of Down syndrome has some symptoms and it is necessary to know all of those symptoms as if he or she can get treatment fast and enjoy a happy life. It is found that there are more than 50 features of Down syndrome and not every person with Down syndrome has all the same features. Some features and problems are common.
Short stature is a sign of DS. A child often develops slowly and it is shorter than average as an adult. Low muscle tone is developed throughout the body. Belly muscles with low muscle tone can also make the stomach stick out. A short, wide neck is another symptom. The neck may have extra fat and skin. Short, stocky arms and legs are also symptoms of Down syndrome. Slanted eyes are also sign of DS. Your doctor may also notice the small spots on the colored part of the eye. A nasal bridge that also looks pushed in. The nasal bridge is the flat part between the eyes and nose. Small ears are also symptoms and they may also be set low on the head.
Intellectual disability is the common symptoms. It is found that most children with Down syndrome have mild to moderate intellectual disability. Heart defects are also important symptoms of DS. It is noted that around half of the children who have Down syndrome are born with a heart defect. Hypothyroidism, celiac disease, and eye conditions are also symptoms of DS. Respiratory infections, hearing problems, constipation, or dental problems are symptoms of DS. Depression or behavior problems are also related with ADHD or autism.
Down syndrome is also caused by abnormal cell division in initial embryo development. Generally, a child inherits forty-six chromosomes, twenty-three from each parent. Each chromosome transmits DNA, called genes, which tell how the body and brain should develop. But a fetus with Down syndrome has additional or abnormal chromosomes. Having extra genetic material also changes the method the brain and body grow. The sort of Down syndrome mainly depends on how many cells have the extra or irregular chromosomes. Medical experts also believe that the cell changes most often begin in a woman’s egg before or at conception. Less frequently, the error happens in sperm at outset. This is not recognized what reasons the cells to division unusually.
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