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Growth charts are different for boys and girls, due in part to pubertal differences and disparity in final adult height. In addition, children born prematurely and children with chromosomal abnormalities such as Down syndrome and Turner syndrome follow distinct growth curves which deviate significantly from children without these conditions. As ...
Down syndrome or Down's syndrome, [12] also known as trisomy 21, is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21. [3] It is usually associated with developmental delays, mild to moderate intellectual disability, and characteristic physical features.
The second, combined with a normal gamete from the other parent, gives rise to a typical child. The third leads to a translocation Down syndrome child. The last becomes a translocation carrier, like the parent. Translocation Down syndrome is often referred to as familial Down syndrome. It is the cause of about 4.5% of the observed Down ...
The average IQ of a young adult with Down syndrome is 50, equivalent to the mental age of an 8- or 9-year-old child, but this number varies widely. [3] At the same time, they enjoy a rich social and emotional awareness. [4] Down syndrome is the most common chromosome abnormality in humans, [3] occurring in about one per 1000 babies born each ...
A child with Down syndrome. A prominent example of a genetically determined neurodevelopmental disorder is trisomy 21, also known as Down syndrome. This disorder usually results from an extra chromosome 21, [41] although in uncommon instances it is related to other chromosomal abnormalities such as translocation of the genetic material.
Living among a small band of Neanderthals in what is now eastern Spain was a child, perhaps 6 years old, with Down syndrome, as shown in a remarkable fossil preserving traits in the inner ear ...
While applying the Bayley Scales of Infant Development (BSID-II), it was found that scales may lead to under-estimates of cognitive abilities in infants with Down syndrome. [7] Researchers excluded a number of items that implicated language, motor , attentional and social functioning from the original measures the modified form was administered ...
According to the study, life expectancy in 1929 for children with Down syndrome, a condition caused by an extra partial or full chromosome, was 9 years. By the 1940s, the expected lifespan had ...