Down2 - Down's syndrome Downs Syndrome is a chromosomal...

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Down's syndrome Down’s Syndrome is a chromosomal condition caused by the presence of all or part of an extra 21st chromosome. It is named after John Langdon Down, the British physician who described the syndrome in 1866. Symptoms Down’s syndrome is a chromosomal disorder that affects both physical and cognitive development. Common characteristics include:- Eyes that slant upwards and outwards; usually accompanied by a vertical fold of skin (epicanthical fold) found at the inner corner of each eye Small, rounded ears Flatness of the face and back of the head Small mouth with a small oral cavity and a large transversely furrowed tongue Short neck and shorter than normal limb length Short stubby hands with incurving of the little finger, usually there is a single palmer crease A big toe which is widely separated from the next toe Hypotonia Most individuals with Down syndrome have intellectual disability in the mild (IQ 50–70) to moderate (IQ 35–50) range Causes
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