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What is the karyotype of down syndrome?
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Hi lybtrate user, Down syndrome�is a chromosomal abnormality characterized by the presence of an extra copy of genetic material on the�21st chromosome, either in whole (trisomy�21) or part (such as due to�translocations). The effects of the extra copy varies greatly from individual to individual, depending on the extent of the extra copy, genetic background, environmental factors.
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