Prenatal testing reveals a genotype associated with mental retardation. What information should the nurse consider when talking with the parents?
1. The changes in genotype indicate the child will have serious developmental delays.
2. Genetic testing is often not accurate.
3. The genotype cannot accurately describe the child's phenotype.
4. Phenotype is not dependent on genotype.
3
Rationale 1: Genotype does not take into account many other aspects of development such as environment.
Rationale 2: These results would not be presented to the parents if they were thought to be inaccurate.
Rationale 3: Changes in genotype indicate a disorder is present but do not identify the extent of the phenotypical expression.
Rationale 4: Genotype is one of the determinants of phenotype.
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