what are its genetic disorders?
Down syndrome, Fragile X syndrome, Angelman syndrome
Neurodevelopmental disorder
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, although in uncommon instances it is related to other chromosomal abnormalities such as translocation of the genetic material. It is characterized by short stature, epicanthal (eyelid) folds, abnormal fingerprints, and palm prints, heart defects, poor muscle tone (delay of neurological development) and intellectual disabilities (delay of intellectual development).

Less commonly known genetically determined neurodevelopmental disorders include Fragile X syndrome. Fragile X syndrome was first described in 1943 by J.P. Martin and J. Bell, studying persons with family history of sex-linked "mental defects". Rett syndrome, another X-linked disorder, produces severe functional limitations. Williams syndrome is caused by small deletions of genetic material from chromosome 7.
The most common recurrent Copy Number Var
the dsm-iv-tr classifies autism related conditions as members of a group of Pervasive developmental disorders what are its characteristics ? Autism is a highly variable, neurodevelopmental disorder whose symptoms first appear during infancy or childhood, and generally follows a steady course without remission. what causes it? It has long been presumed that there is a common cause at the genetic, cognitive, and neural levels for autism's characteristic triad of symptoms how is it classified? Autism is one of the five pervasive developmental disorders (PDD), which are characterized by widespread abnormalities of social interactions and communication, and severely restricted interests and highly repetitive behavior. how is it associated with social development? People with autism have social impairments and often lack the intuition about others that many people take for granted. what are the consequences of the latter disorder mentioned above? Different degrees of mental, emotional, physical, and economic consequences for individuals, and in turn families, social groups, and society.
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Neurodevelopmental disorder [SEP] Genetic disorders
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, although in uncommon instances it is related to other chromosomal abnormalities such as translocation of the genetic material. It is characterized by short stature, epicanthal (eyelid) folds, abnormal fingerprints, and palm prints, heart defects, poor muscle tone (delay of neurological development) and intellectual disabilities (delay of intellectual development). Less commonly known genetically determined neurodevelopmental disorders include Fragile X syndrome. Fragile X syndrome was first described in 1943 by J.P. Martin and J. Bell, studying persons with family history of sex-linked "mental defects".