whats down syndrome.?

what is it and why dose it do

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  • 9 years ago
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    Down syndrome is a chromosomal disorder caused by an error in cell division that results in an extra 21st chromosome. The condition leads to impairments in both cognitive ability and physical growth that range from mild to moderate developmental disabilities. Through a series of screenings and tests, Down syndrome can be detected before and after a baby is born.

    What causes Down syndrome?

    Down syndrome occurs because of an abnormality characterized by an extra copy of genetic material on all or part of the 21st chromosome.

    There are normally 46 chromosomes in each cell, 23 inherited from your mother and 23 from your father. When some or all of a person's cells have an extra full or partial copy of chromosome 21, the result is Down syndrome.

  • 9 years ago

    Down syndrome is a genetic condition in which a person has 47 chromosomes instead of the usual 46. People with down syndrome are mentally and sometimes physically disabled and have a average IQ of 50.

  • Anonymous
    9 years ago

    It is the modern medical term for what we used to call Mentally Retarded, which has become a taboo phrase or label to use.

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