The mother of an infant with down syndrome asks the nurse what causes the disorder. before responding, the nurse recalls that the genetic factor of down syndrome results from what?

The answer to this question would be: Extra chromosomal material

Down syndrome is a genetic disease that caused by trisomy of chromosome 21. Trisomy means that the chromosome is having an extra pair, making a total of 3 chromosomes instead of 2. The disease will cause the child to have an intellectual disability. The primary risk factor for this disease would be old mother.

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