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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 ...
The Safier brothers are part of a group of creators who make content about having a brother or sister with Down syndrome, which is associated with physical and mental difficulties. March 21 (3/21 ...
Developmental disability. Developmental disability is a diverse group of chronic conditions, comprising mental or physical impairments that arise before adulthood. Developmental disabilities cause individuals living with them many difficulties in certain areas of life, especially in "language, mobility, learning, self-help, and independent ...
3% of newborns (US) [ 8 ] Deaths. 628,000 (2015) [ 9 ] A birth defect[ a ] is an abnormal condition that is present at birth, regardless of its cause. [ 2 ] Birth defects may result in disabilities that may be physical, intellectual, or developmental. [ 2 ] The disabilities can range from mild to severe. [ 6 ]
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 ...
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.
Down syndrome is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21. [1] It is typically associated with developmental delays, characteristic physical features, and mild to moderate intellectual disability. [2] The average IQ of a young adult with Down syndrome is 50, equivalent to the mental age of an 8 ...