WebFeb 15, 2000 · As many as one fourth of persons with mental retardation have a detectable chromosome abnormality. Children with Down syndrome (trisomy 21) usually have … WebNov 7, 2013 · About Fragile X Syndrome. Fragile X syndrome is a genetic disorder that affects a person’s development, especially that person’s behavior and ability to learn. In addition, Fragile X can affect: Communication skills. Physical appearance. Sensitivity to noise, light, or other sensory information. Fragile X syndrome is the most common form …
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WebSep 28, 2024 · Illness or injury. Infections like meningitis, whooping cough, or the measles can lead to intellectual disability. Severe head injury, near-drowning, extreme … WebMar 19, 2024 · Trisomy 21, also known as Down syndrome, is a condition characterized by a distinctive pattern of minor and major anomalies associated with excess chromosome 21 material. Fig. 52. Common traits in trisomy 21 (Down syndrome) Physical traits – include upslanting palpebral fissures, flat nasal bridge and midface, decreased muscle tone … haughton gas
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WebMar 8, 2024 · Down syndrome is a genetic disorder caused when abnormal cell division results in an extra full or partial copy of chromosome 21. This extra genetic material causes the developmental changes and physical features of Down syndrome. Down syndrome varies in severity among individuals, causing lifelong intellectual disability and … WebIntellectual disability can be caused by a problem that starts any time before a child turns 18 years old – even before birth. It can be caused by injury, disease, or a problem in the brain. For many children, the cause of their intellectual disability is not known. Some of the most common known causes of intellectual disability – like Down ... WebOct 5, 2013 · Autism vs Down Syndrome . Autism and Down syndrome are well known causes of mental retardation. There are other causes of mental retardation, as well. … boozehound crossword clue