What is the cause of down syndrome mention any two characteristics in the suffer of thi s syndrome
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Down syndrome is a genetic disorder caused when abnormal cell division results in extra genetic material from chromosome 21.
Down syndrome causes a distinct facial appearance, intellectual disability, developmental delays, and may be associated with thyroid or heart disease.
Characteristics:
small nose and flat nasal bridge
small mouth with a tongue that may stick out
eyes that slant upwards and outwards
a flat back of the head
broad hands with short fingers
their palm may have only one crease across it
below-average weight and length at birth
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