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Trisomy 21. Down syndrome (also known by the karyotype 47,XX,+21 for females and 47,XY,+21 for males) [98] is mostly caused by a failure of the 21st chromosome to separate during egg or sperm development, known as nondisjunction. [91] As a result, a sperm or egg cell is produced with an extra copy of chromosome 21; this cell thus has 24 ...
Down syndrome is a genetic disorder that often results in distinct physical differences and intellectual disability. According to the Centers for Disease Control, each year about 6,000 babies are ...
Savant syndrome (/ ˈsævənt, sæˈvɑːnt / SAV-ənt, sə-VAHNT, US also / səˈvɑːnt / sav-AHNT) is a phenomenon where someone demonstrates exceptional aptitude in one domain, such as art or mathematics, despite significant social or intellectual impairment. [1]
Intellectual disability (ID), also known as general learning disability (in the United Kingdom [3]) and formerly mental retardation (in the United States [4]), [5][6] is a generalized neurodevelopmental disorder characterized by significant impairment in intellectual and adaptive functioning that is first apparent during childhood.
March 21 (3/21) is World Down Syndrome Day, chosen because people with Down Syndrome have three copies of the 21st chromosome instead of the usual two. "Gabe lives his life to the fullest," Nick ...
It is characterized by short stature, epicanthal folds, abnormal fingerprints, and palm prints, heart defects, poor muscle tone (delay of neurological development), and intellectual disabilities (delay of intellectual development). [42] Less commonly known genetically determined neurodevelopmental disorders include Fragile X syndrome.
Here are amazing individuals with Down syndrome who are breaking the barriers of disability stigmas. Edward Barbanell. A comedian who has been in hit productions such as Workaholics and The Ringer ...
Williams syndrome (WS), also Williams–Beuren syndrome (WBS), is a genetic disorder that affects many parts of the body. [2] Facial features frequently include a broad forehead, underdeveloped chin, short nose, and full cheeks. [2] Mild to moderate intellectual disability is observed in people with WS, with particular challenges with visual ...