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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.
An anaphase lag of a chromosome 21 in a Down syndrome embryo leads to a fraction of euploid cells (2n cells), phenomenon described as "aneuploidy rescue". There is considerable variability in the fraction of cells with trisomy 21, both as a whole and tissue-by-tissue. This is the cause of 1–2% of the observed Down syndromes. [4]
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 ...
Some of the undersigned are inclined to replace the term Mongolism by such designations as 'Langdon Down Anomaly', or 'Down's Syndrome or Anomaly', or 'Congenital Acromicria'. Several of us believe that this is an appropriate time to introduce the term 'Trisomy 21 Anomaly', which would include cases of simple Trisomy as well as translocations.
Pages in category "Down syndrome in film" The following 44 pages are in this category, out of 44 total. This list may not reflect recent changes. A. AfterLife (film)
Lily breaks the mold of some people's concept of individuals with Down syndrome. She holds a job and is an important member of her community. She is able to live on her own and do everything a regular member of society can do. By inviting viewers into the details of her daily life, she proves that she is no different from anyone else.
Pages in category "Down syndrome" The following 16 pages are in this category, out of 16 total. This list may not reflect recent changes. ...
First major character with Down syndrome on a television series, portrayed by a person who also has Down syndrome. Chris Burke [113] 2018 Penny Stevenson: Doctors: She was born with a right arm that ends just below the elbow. Cerrie Burnell [114] 1994 Kerry Weaver: ER: Limp in her gait due to congenital hip dysplasia: Laura Innes [115] [116 ...